DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!

Magic Balloons

DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!

For ages 4 and up.

For the past month, my 6 year old son has been a balloon blowing machine. He was thrilled when I pulled together this fun kids’ science experiment showing him four ways to blow up a balloon WITHOUT his mouth. Ready to give these magic balloons a try too?

To Prep

I grabbed my supplies:

    • 2 clean bottles
    • yeast
    • a teaspoon of sugar
    • vinegar
    • baking soda
    • a packet of Pop Rocks candy
    • a roll of mint Mentos
    • a couple bottles of soda
    • a funnel
    • and balloons {You’ll want the big, regular sized balloons rather than water balloons.}

Magic Balloon #1: Warm Water and Yeast

In our first bottle we poured in about an inch of warm water and then dumped in the entire packet of yeast.  We swirled the yeast around a bit and then added the teaspoon of sugar and gave it another good swirl.  We put the balloon over the mouth of the bottle and then let it sit in the sun.

It only took about five minutes for the yeast to start bubbling and our balloon to start inflating!”Ew, what is it?” C asked, looking at the foam that was starting to bubble.   “Yeast is a type of bacteria so it’s actually a living thing,” I explained.

“It’s eating the sugar that we added and when it eats the sugar, it creates a gas called carbon dioxide that makes all those bubbles. That carbon dioxide is filling up the balloon.”

Magic Balloon #2: Vinegar and Baking Soda

In our second bottle, we poured a couple inches of vinegar.  We prepped the balloon by using the funnel to fill half of it with baking soda.  I put the balloon over the mouth of the bottle and then C dumped in the baking soda.   The effect was instantaneous and the balloon quickly inflated as the bicarbonate baking soda reacted with the acetic acid in the vinegar making carbon dioxide.

Magic Balloon #3: Diet Coke and Pop Rocks

Our third bottle was half filled with Diet Coke.  I d the Diet Coke because it didn’t leave a sticky mess, but any soda would work.  We found that we got a better reaction if we opened a fresh bottle and poured out the soda we didn’t want rather than pouring soda into an empty bottle — I think it stayed better carbonated.

To prep this balloon, we dumped a pack of Pop Rocks into it.  I stretched the balloon over the mouth of the bottle and C dumped them into the Diet Coke.

This one was definitely the noisiest! You could hear all the popping going on in the bottle as the Pop Rocks released their pressurized carbon dioxide.

Magic Balloon #4: Diet Coke and Mentos

For the last bottle, we filled half of it with Diet Coke again.  We put two Mentos in the balloon, stretched it over the mouth of the bottle, and then dumped them into the Coke.

We actually ended up doing this experiment twice because the first time we didn’t have enough soda in the bottle so it produced a pretty weak reaction.  Half a bottle seemed to work just fine and the Mentos were a great catalyst, causing the Diet Coke release its carbon dioxide.

We lined up our bottles to check out the results.

“Which bottle do you think blew up the balloon the best?” I asked C.

“This one!” he exclaimed, pointing to the yellow balloon of the vinegar and baking soda bottle.  I explained to C that all of these combinations created carbon dioxide.  The carbon dioxide fills the bottle and then moves into the balloon, blowing it up.  Each reaction produces a different amount of carbon dioxide. Which one did he think made the most?

“The one with the yellow balloon,” he said.  “It’s the biggest.”   We tried the experiment a couple times more to see if our results were the same.  We used the same color balloon for each reaction to make it easier to compare past and current results.  The bottle with vinegar and baking soda was the clear winner again.

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Ready for more fun with science? Make a rainbow in a jar, create bicolor flowers and walk on eggs.

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Under Pressure! 10 At-Home Science Experiments That Harness Air

DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!

If the at-home orders have you scrambling for indoor activities, we’ve got easy science experiments you can pull out at a moment’s notice. Each reveals air’s invisible power, and (usually) uses what you’ve got in the recycling bin to demonstrate it. Read on to learn how to levitate water, submerge tissues without getting them wet and suck an egg into a jug using only a match.

photo: Allison Sutcliffe

Thankfully, science doesn’t have to be super complex or time consuming. These easy-peasy experiments only require a little prep and leave a big impression on tiny minds. Plus, we’re betting most of what you need to test these theories is already lying around your house.

1. Sink or Swim. Instead of bobbing for apples, your tiny tot will make straws dive and surface with a gentle squeeze. The Kids Activities Blog lays out the important deets for this hands-on experiment that uses a two-liter bottle and play dough to fully certify straws as scuba-ready. Take the dive into serious science with this one!

Why it works: Squeezing the bottle increases the air pressure inside the bottle and forces water up into the straw, which makes it heavy enough to sink.

photo: Allison Sutcliffe

2. Blow Their Minds. Bet your cutie a clean room that she can’t blow a rolled up piece of paper towel into an empty bottle. Sounds a safe bet, right? But thanks to air pressure, the cards are definitely stacked in your favor. To set up the experiment, place an empty two-liter bottle on its side.

Ball up the corner of a paper towel that’s about half the size of the bottle’s top and place it just inside the opening then challenge your little scientist to blow the paper towel into the bottle (Trust us, it can’t be done). No matter how hard she tries, she’s not going to win that bet.

Learning plus a clean room? We’ll take it!

Why it works: Even though you can’t see it, that bottle is full of air; when you try to blow something into it, there’s just no room.

3. Be Unpredictable. Two balloons, a yardstick, string, and a hairdryer are all you need for this experiment that will keep your mini me guessing.

To get things moving in the right direction, blow up the balloons to the same size and then use the string to attach them, a few inches apart, to the yardstick. Once you’re all set up, ask your kidlet what will happen to the balloons when you aim air from the hair dryer between the two balloons.

The obvious answer? They’ll be blown apart. But once your wee one takes aim, she’ll see that the balloons are actually pushed together rather than apart. Who knew?

Why it works: Blowing air between the balloons lowers the air pressure and makes the pressure surrounding them higher, pushing them together.

photo: Allison Sutcliffe

4. Levitate Water. You won’t need to incant Wingardium Leviosa with perfect pronunciation to suspend water during this exciting experiment. Start by filling a glass of water about 1/3 full, then cover it with a piece of cardstock.

Tip the glass over, keeping the cardstock in place with your hand, and hold the whole shebang over your unsuspecting kidlet’s head (or a sink if you want to do a test run first!). Then slowly let go of the cardstock while your mini me waits excitedly below.

Look ma, no splash! The card stays in place and your little guinea pig stays dry.

Why it works: The outside air pressure working against the cardstock is greater than the weight of the water in the glass.

photo: Allison Sutcliffe

5. Grab a Tissue. To be wet or not to be wet is the question answered in this simple experiment full of drama.

To set the scene, loosely crumple a tissue so that when you stick it in a small glass and turn it over the tissue doesn’t fall out.

Then, have your little lab assistant fill a bowl with water, turn the glass over and submerge it completely (psst… keep the glass parallel to the water to make the experiment work). Ta da! The tissue stays dry even when it’s below the water line.

Why it works: The air pressure inside the glass is strong enough to keep the water out and the tissue dry.

photo: Wesley Fryer via flickr

Get mom or dad in on the action with these experiments that take a little more time and some helping hands to demonstrate just how powerful air pressure can be.

6. Blast Off. Nothing makes air pressure more tangible than a classic bottle rocket launched on a sunny summer afternoon.

You and your sidekick can spend time fashioning a plastic bottle into a space-worthy vessel with a cone top and flamboyant fins on the side.

Then, hook it up to the air pump and let her rip! Up, up and away! Science Sparks has simple instructions you can use (and even a cool video!) to make one with your budding scientist.

Why it works: Pumping air into the bottle builds up pressure until you just can’t add any more and all that force sends the rocket flying.

photo: AJ via flickr

7. Make Eggs Magical. This “look ma, no hands, wires or mirrors” trick will get them every time; an egg being sucked into a jar while your little scientist delightedly looks on is always a hit. To perform this illusory feat, you’ll need a glass jar with an opening just smaller than an egg (think: old school milk jug) and a peeled, boiled egg.

When you and your Little have checked these items off your list, it’s time to start the show. Mom or dad should toss a lit match into the glass jar, followed by your mini lab assistant, who’ll quickly set the egg over the opening. Abracadabra! Alakazam! The match dies out; the egg gets (seemingly) inexplicably sucked into the bottle.

And just that you’ve performed another bit of parent magic without breaking a sweat.

Why it works: The match uses up the air inside the bottle. Once that happens the pressure outside the bottle is greater and pushes the egg down into the bottle.

8. Build a Barometer. The invisible air pressure around us is always changing, but try explaining that to the tot lot. We've found a seeing-is-believing DIY barometer experiment to turn the tides for your tiny skeptic.

Not only will you reveal ever-changing air pressure, but you can also predict any summer storms heading your way. Get all you need to know about making your own version using a screw-top jar, rubber bands and a straw at Wonderful Engineering.

Why it works: When the air pressure is high, it pushes down on the straw tilting it up, and when it’s low, pressure inside the jar pushes up against the straw pointing it down.

photo: Ruth Hartnup via flickr

9. Inflate Marshmallows. Put those marshmallows you’re stockpiling for summer s’mores to good use in this DIY vacuum experiment. To make the vacuum, use a hammer and nail to pierce a hole (big enough to fit a straw) into the lid of a screw-top glass jar.

Next, stick a straw ever-so-slightly into the hole and seal the edges with play dough or molding clay so there’s no way for the air to get out other than through that straw.

Now you’re ready to see what happens to a marshmallow when it’s trapped inside; place the marshmallow in the jar, screw the top back on, and have your mini me take the air out gulp by gulp through the straw (just be sure to cover the straw hole between breaths so no air makes it back in). As the air is removed, the marshmallow expands, a nightmare vision straight Ghostbusters. Who you gonna call?

Why it works: When you use a straw to remove all the air from the jar, there’s no air left working against the marshmallow. Instead, the air trapped inside the marshmallow is able to expand.

10. Pit Balloons Against Bottles. Is your future scientist ready for another challenge? Just blowing a paper towel into a jug, this experiment from Steve Spangler Science is oh-so-much harder than it looks.

To entice your little experimenter, place an un-inflated balloon into an empty plastic bottle and ask him if he thinks he can blow it up.

Easy right? But no matter how hard he tries, that balloon just won’t fill with air! The trick to inflating the balloon is a simple one that takes mom or dad’s helping hand and just that, what was once impossible becomes possible!

Why it works: At first, the bottle is full of air so there’s no room for the balloon to expand when you try to blow it up. But when you try this experiment after the trick, there’s an escape route for the air inside the bottle, leaving room for the balloon to inflate.

—Allison Sutcliffe


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23 Best Easy Science Experiments for Kids – Fun Science Activities and STEM Projects

DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!


The cool thing about science is that it describes what's happening all around us, all the time. Sometimes, though, kids find it hard to connect what they know about science to the real world.

These easy science experiments for kids can be done at home, with everyday household items, to show kids that the abstract concepts they may have hard about actually have influence over their normal, everyday lives.

Next time your kids are looking for fun indoor activities, set up one of these experiments and watch them be amazed — we tried to find DIY projects that have a flair for the dramatic.

You can find a subject they're particularly interested in, whether it's Earth science, weather, magnetism, astronomy, or even chemistry, which is often the hardest one to grasp in the real world.

But, of course, it must be said that even when you're not in the lab, safety counts: wear goggles and coats or aprons if need be (sometimes kids get a kick how scientific the protective gear makes them look), and always make sure that the kids are supervised when doing them (especially the projects that involve fire). Then, pave the way for your future Nobel winner.

1 of 23

Apple Oxidation

What works best for keeping an apple from turning brown? Test to find out! Slice up an apple, and let each slice soak in a different liquid.

Then take them out, lay them on a tray, and check the brownness after three minutes, six minutes, and so on.

Not only does this test the properties of different liquids, it also helps students practice the scientific method if they create hypotheses about which liquids would be most effective.

Get the tutorial at Jennifer Findley »

RELATED: 50 Fun Activities for Kids Will Keep Them Entertained for Hours

2 of 23

Chromatography Flowers

Chromatography is the process of separating a solution into different parts — the pigments in the ink used in markers.

If you draw stripes around a coffee filter, then fold it up and dip the tip in water, the water will travel up the filter and separate the marker ink into its different pigments (in cool patterns that you can display as a craft project). This family made the end-result even brighter by adding an LED circuit to the center.

Get the tutorial at Steam Powered Family »

3 of 23

Water Walking

You'll need six containers of water for this one: three with clear water, one with red food coloring, one with blue coloring, and one with yellow coloring.

Arrange them in a circle, alternating colored and clear containers, and make bridges between the containers with folded paper towels.

Your kids will be amazed to see the colored water “walk” over the bridges and into the clear containers, mixing colors, and giving them a first-hand look at the magic of capillarity.

Get the tutorial at Fun Learning for Kids »

4 of 23

Magic Milk

Put a few drops of food coloring in a shallow bowl of milk, and they'll stay that way — as self-contained blobs.

But add a little dish soap to a toothpick or a Q-tip and touch the food coloring, and the colors will swirl around on their own magic.

It all has to do with surface tension: At first, the food coloring stays on the surface, but the soap causes a chemical reaction that breaks the surface tension.

Get the tutorial at Live Life and Learning »

5 of 23

Grow Crystals

Bend pipe cleaners into fun shapes, and watch them grow crystals when left overnight in a Borax solution. (Words of warning: Always be careful with Borax and kids, and make sure they understand that the end result is not candy even though it looks it could be.)

Get the tutorial at One Little Project »

6 of 23

Gravity-Defying Magnets

Hang paperclips from a ruler or dowel, and they dangle, as they should, because of gravity. But you can show kids how other forces can overcome gravity by putting strong magnets on a ruler and using them to get the paperclips to stand straight up.

Get the tutorial at Buggy and Buddy »

7 of 23

Pencils Through a Bag of Water

Kids might guess that if you pierce a bag of water with a sharpened pencil, the water would all leak out. In fact, if you do it right, the polymers of the bag's plastic will re-seal around the pencil, and your counters will stay dry (and your kids will be amazed). You can get them thinking about the chemical compositions that make up everyday items.

Get the tutorial at Fun With Mama »

8 of 23

Mold Science

Mold experiments are always grossly fascinating, and you can see how different additives (salt, vinegar, etc.) affect the growing of mold on bread.

For a twist on this experiment that might lead to more hygienic habits, you can also see how mold grows on bread that's been touched by hands that have been washed with soap and water, cleansed with hand sanitizer, or not washed at all. That'll get them scrubbing for 20 seconds.

Get the tutorial at Life With Moore Babies »

9 of 23

Instant Ice

Give your little scientists the powers of Elsa! Water can turn into ice as it's being poured. The secret is to chill water in the freezer until it's almost frozen, then pour it over ice placed on an overturned ceramic bowl. Kids can see the transformation between the states of matter, and also how ice crystals are formed.

Get the tutorial at Only Passionate Curiosity »

10 of 23

Self-Inflating Balloon

A twist on a vinegar-and-baking-soda experiment, if you put baking soda in an empty bottle and vinegar in a balloon, when you attach the ballon over the mouth of the bottle and let the vinegar pour in, the resulting gas will be enough to inflate the balloon on its own. Bonus: This experiment is less messy than a vinegar-baking-soda volcano.

Get the tutorial at Mess for Less »

11 of 23

Tea Bag Rocket

Want a memorable way to teach kids that hot air rises? Take the tea a tea bag, hollow it out and stand it up, and (carefully) take a match to it. The hollowed-out bag is so light, it rises along with the hot air, and becomes a flying tea bag.

Get the tutorial at Paging Fun Mums »

12 of 23

Lava Lamp

Oil and water with food coloring don't mix, teaching kids about density. For fun, add an antacid tablet, and bubbles start to flow all around a groovy lava lamp.

Get the tutorial at Rookie Parenting »

13 of 23


Making a homemade sundial is one of the lowest-prep science experiments you can do: You just need a dowel or a good stick, a paper plate, and a marker. Mark the position of the dowel's shadow every hour, and you've got an easy opening into talking about the Earth's rotation. The next day, see if your sundial tells accurate time while playing outside.

Get the tutorial at Happy Brown House »

14 of 23

Sink or Float?

Having kids figure out what makes certain objects sink and what makes them float is a good way to teach them about density — and an even better way to get them practicing the scientific method, if they make a hypothesis first about what will sink and float and then measure the results.

Get the tutorial at Fun with Mama »

15 of 23

Tornado in a Bottle

Secure two two-liter bottles together with water inside, flip upside down, give a shake, and watch a tornado form its distinctive funnel shape. You can also put glitter or small items in the bottle to show how a tornado's winds would whip objects around in the real world.

Get the tutorial at Gift of Curiosity »

16 of 23

Ice Cream in a Bag

Finally! An experiment you can actually eat. Toss the ingredients in a bag, seal it up, and have your kids shake it vigorously for 10 minutes. Will they absorb the lesson about how energy transforms states of matter? Maybe, but, either way, you get to have a treat.

Get the tutorial from Delish »

17 of 23

Skittles Patterns

For another experiment you can do with food, set Skittles into a shallow bowl of water, and see how the colors swirl. Skittles are basically pure sugar and dissolve in water, so you can use this as in intro to solvents, solutes, and solutions.

Get the tutorial at Coffee Cups and Crayons »

19 of 23

Egg in a Bottle

A peeled hard-boiled egg can't fit into a bottle without smushing into a big mess, can it? It can — if you put a burning piece of paper in the bottle first.

The burning paper in the bottle causes the air to expand and the pressure to go up. When the fire runs oxygen, the temperature cools and the air contracts, sucking the egg through the bottle opening.

The fire and the sucking of the egg makes this an extra-dramatic experiment.

Get the tutorial at Left Brain Craft Brain »

20 of 23

Grow an Avocado Tree

For an easy lesson in Earth Science, your family can grow an avocado tree from a pit. You can buy an AvoSeedo kit, or just peel the seed and suspend it over water with toothpicks.

Get the tutorial »

21 of 23

Balloon-Powered Car

This project focuses mostly on the engineering side of STEM. You need some household items (toothpicks, bottle caps, coins) and an empty juicebox to construct the car — and then you can inflate the balloon through the straw and watch it go!

Get the tutorial at Raising Whasians »

23 of 23

Color Cabbage

You can show them how plants get water from their roots to their leaves — literally — by putting cabbage (or celery, but cabbage is more colorful) in food coloring. You can also use this as an an example of capillary action, the water-walking experiment,

Get the tutorial at Itsy Sparks »


Baking Soda and Vinegar Balloon Experiment for Kids

DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!

Combine quick science and balloon play with our easy to set up chemistry for kids! Test out this balloon baking soda science activity! It’s a must save homemade science experiment for fizzing baking soda and vinegar science all year long! Just a few simple ingredients from the kitchen and you have amazing chemistry for kids at your fingertips. The science you can actually play with too!


It’s Easy to Inflate Balloons with This Simple Chemical Reaction kids can easily do!

It’s so easy to set up this balloon baking soda and vinegar activity. We used refillable ornaments from this past Christmas, but you can also use water bottles! You just need to be able to seal the end of the balloon around a top.

CHECK OUT ALL OUR: Fizzing Science Experiments


Let’s keep it basic for our younger or junior scientists! Chemistry is all about the way different materials are put together, and how they are made up including atoms and molecules. It’s also how these materials act under different conditions. Chemistry is often a base for physics so you will see overlap!

What might you experiment within chemistry? Classically we think of a mad scientist and lots of bubbling beakers, and yes there is a reaction between bases and acids to enjoy! Also, chemistry involves matter, changes, solutions, and the list goes on and on.

We will be exploring simple chemistry you can do at home or in the classroom that isn’t too crazy, but is still lots of fun for kids! You can check out some more chemistry activities here.

Make sure to grab your FREE printable simple science experiments cheat sheet for more great science projects to get started with right away! See the bottom of the page!


  • Baking Soda
  • Vinegar
  • Empty Water Bottles
  • Balloons
  • Measuring Spoons
  • Funnel {optional but helpful)

My son suggested we try different amounts of baking soda in our balloon baking soda experiment to see what would happen. Always encourage your kids to ask questions and wonder about what will happen if…

This is a great way to encourage inquiry, observation skills, and critical thinking skills. You can read more about teaching the scientific method to young kids here.

Looking for easy to print activities, and inexpensive science experiments? 

We have you covered…

Click below to get your quick and easy science activities. 


  •  Blow up the balloon a bit to stretch it out some.
  •  Use the funnel and teaspoon to add baking soda to the balloon. We started with 2 teaspoons and added a teaspoon for each balloon.
  •  Fill the container with Vinegar  halfway
  •  When your balloons are all made attach to containers making sure you have a good seal!
  •  Lift up the balloon to dump the baking soda into the container of vinegar
  •  Watch the balloon fill up
  •  To get the most gas it, we swirled around the container to get it all going!

Go ahead and use a sharpie to draw emojis, shapes, or fun pictures on your balloons before filling them with baking soda.

Make predictions! Ask questions! Share observations!

Test out different size containers. Above we grabbed some plastic Christmas ornaments and an egg carton to hold them!

Yes, we even had to try dumping them upside down to see what would happen. This is where a good seal comes in handy! What else can you do with baking soda? Check out these unique baking soda science activities!


The science, behind this balloon baking soda experiment, is the chemical reaction between the base {baking soda} and the acid {vinegar}. When the two ingredients mix together the balloon baking soda experiment gets it’s lift!

That lift is the gas produced from the two ingredients is carbon dioxide or CO2. As the gas tries to leave the plastic container, it goes up into the balloon because of the tight seal you have created. Because the gas has nowhere to go and is pushing against the balloon it inflates it!  Similarly, we exhale carbon dioxide when we blow up balloons.

Click below to get your quick and easy science activities. 


Don’t have vinegar? Try a citric acid lemon juice and check out our CITRUS CHEMICAL REACTIONS here.

Do be cautious with the amount of baking soda you add, as the reaction will get bigger each time. Safety goggles are always great for scientists!

You could definitely see the difference in the amount of baking soda we put in the balloons! The red balloon with the least baking soda inflated the least. The blue balloon with the most inflated the most. Enjoy simple science at home or in the classroom with this classic experiment.


Here’s an additional balloon baking soda science experiment to try:

Fill one balloon using this cool chemical reaction and tie it off.

Next, blow up a balloon using your own carbon dioxide to about the same size or as close as possible.

Hold both balloons at arm’s length from your body. Let go!

What happens? Does one balloon fall at a different speed than the other? Why is this? Although both balloons are filled with the same gas, the one you blew up is not as saturated with pure CO2 as the one blown up with baking soda and vinegar.


Explore physics with either a balloon rocket or our balloon peered LEGO cars! Balloons are a great way to explore Newton’s third law of motion. You can also explore simple static electricity with a balloon.



Looking for easy to print activities, and inexpensive science experiments? 

We have you covered…

Click below to get your quick and easy science activities. 


Balloon Blow-up Science Experiment

DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!

It’s time for another balloon science experiment! Last time we made a balloon fly across the room a rocket and this time we are going to blow up a balloon without using our mouths.

This is a great experiment for young children because the set-up is simple and it only takes a few minutes to get to the exciting finale. Enjoy!

Supplies Needed for the Balloon Blow-Up Science Experiment

  • Small Soda Bottle
  • Balloon
  • Baking Soda
  • Vinegar
  • Funnels
  • Teaspoon

Watch The Balloon Blow-up Science Experiment Video

Want Step by Step Video Instructions? Watch the Detailed Blowing Up a Balloon Science Experiment Step by Step Instructions Video

Balloon Blow-up Science Experiment Instructions

Step 1 – Using a funnel, pour about a third of a cup of vinegar into the bottle.

Tip: I used Apple Cider Vinegar, but any kind of vinegar will work.

Step 2 – Then insert another funnel into the mouth of the balloon.

Tip: It is best to have two funnels, one for filling the bottle with vinegar and one for the balloon. If you only have one funnel, it is important that you completely wash and dry the funnel after you add the vinegar and before you put it into the balloon.

Step 3 – Place two teaspoons of baking soda into the funnel so it falls into the balloon. Then remove the balloon from the funnel.

Step 4 – Next, secure the the mouth of the balloon over the top of the bottle.

Tip: Don’t let any of the baking soda drop into the bottle…yet!

Step 5 – While holding the bottle, lift the end of the balloon allowing the baking soda to drop into the bottle

Step 6 – Watch in amazement as the balloon magically inflates

How Does the Balloon Blow-up Science Experiment Work

When baking soda and vinegar are mixed together, it creates a gas called carbon dioxide.  The gas begins to expand in the bottle and starts to inflate the balloon.  The more gas that is created, the larger the balloon will inflate.

I hope you enjoyed the experiment.  Here’s some printable instructions!

  • Small Soda Bottle
  • Balloon
  • Baking Soda
  • Vinegar
  • Funnel
  • Teaspoon
  1. Using a funnel, pour about a third of a cup of vinegar into the bottle. Tip: I used Apple Cider Vinegar, but any kind of vinegar will work.
  2. Then insert another funnel into the mouth of the balloon.

    Tip: It is best to have two funnels, one for filling the bottle with vinegar and one for the balloon. If you only have one funnel, it is important that you completely wash and dry the funnel after you add the vinegar and before you put it into the balloon.

  3. Place two teaspoons of baking soda into the funnel so it falls into the balloon. Then remove the balloon from the funnel.

  4. Next, secure the the mouth of the balloon over the top of the bottle. Tip: Don’t let any of the baking soda drop into the bottle…yet!
  5. While holding the bottle, lift the end of the balloon allowing the baking soda to drop into the bottle.
  6. Watch in amazement as the balloon magically inflates!

And once you are done with this experiment, you’ll definitely want to try the Balloon Rocket Experiment next.


63 Easy Science Experiments for Kids Using Household Stuff

DIY Science Experiment To Do With The Kids – Inflate Balloons Without Air!

Searching for kid-friendly science experiments to do at home? Whether you're prepping for a fifth-grade science fair or want something fun to do with preschoolers, these cool science experiments for kids are super easy and a lot of fun for kids of all ages. Who knows, mom and dad may end up learning a new thing or two, too.

Besides, children are born scientists. They're always experimenting with something, whether they're throwing a plate of spaghetti on the wall, blowing bubbles in the bathwater, or stacking blocks into an intricate tower only to destroy it in one big swipe.

As they get older, you may decide to enroll them in a FREE online coding class to get a leg up in today's digital world, a STEM summer camp, or work together on their very first (or final) science fair project.

But you can actually do some pretty mind-blowing, hands-on science experiments at home using stuff you probably have lying around the house.

Find more STEM fun for kids of all ages in our STEM and Science Experiments for Kids Guide.

We're also big fans of science kits that deliver all the materials you need (and instructions!) in one box. Here are a few of our favorites that you might want to stock up on: All of the Thames and Kosmos kits, including the awesome Robotics Workshop, Crystal Growing kit, and the Electricity and Magnetism kit.

The Elenco Snap Circuits kit can get young engineers going, as can a number of the Lego Robotics or Lego Gadget kits. Build a Solar Rover with 3M's science kit, and the youngest scientists might start with Playz Explosive Kitchen Lab or National Geographic's science kits, including the Build Your Own Volcano.

Coolest Science Experiments for Kids at Home

Kids can make their own sweet treat with this science experiment: rock candy in a glass. Photo courtesy of Wikivisuals

1. Learn about the crystallization process by growing rock candy in a glass.

2. Make a lava lamp by pouring vegetable oil into water and then adding an alka-seltzer tablet to make the blob of oil move.

3. Borax plus glue equals homemade slime.

4. Blow bubbles outside when temperatures dip to the single digits and watch them freeze.

5. Use lemon juice to make invisible ink that can only be seen when held up to a heat source.

6. Use food coloring and water to make a walking rainbow and explore how combining primary colors makes secondary colors.

Scram pepper! Soap chases the intruder in this science experiment.

7. Dish soap, pepper, a toothpick, and a little bit of water are all kids need to feel science wizards. Watch a little drop of soap chase pepper away in the Pepper & Soap Experiment.

8. Create carbon dioxide and hang on while you use it to fill up a balloon.

Fun Science Experiments Using Household Staples

9. Build a marshmallow catapult  a plastic spoon, rubber bands, and Popsicle sticks.

10. Use a plastic bag and cup to build a parachute for a light toy.

11. Place white flowers in colored water and watch how they soak up the hues.

Fizzy lemons are an easy all-ages science experiment.

12. Create a colorful and fizzy reaction by adding a drop of food coloring and a little baking soda to a sliced lemon. 

13. Make your own butter by shaking a jar of heavy cream.

14. Make homemade ice cream in a bag: shake salt, ice, cream, and sugar vigorously until the consistency is right, then enjoy.

15. Plop oil into water to see that they really don't mix; try it with a variety of liquids to make a rainbow of stripes.

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Make sure an adult lights the candle for this amazing egg in a bottle science experiment. Photo courtesy of Wikivisuals

16. Force an egg to fit into a bottle by creating a suction using heat.

17. Change how an egg floats or sinks in a glass by adding salt to the water.

18. Turn milk into a material that acts plastic using white vinegar.

19. Mix a batch of bread dough and separate it into several different bowls; place them in different places (outside, inside, in the dark, in the light) to see which environment yeast thrives in.

20. Grow mold on bread by putting slices in different environments (in a bag in the dark, in a bag in the sunlight, out in the open, in the refrigerator); see which one gets moldy first.

21. Have your kids close their eyes and hold their nose and see if they can still identify foods by taste.

22. Dabble in some kitchen science while making this yummy ricotta cheese.

Watch vinegar dissolve the shell of an egg!

23. Your egg will be so embarrassed when you leave it naked! Dissolve the shell right off an egg by simply placing it in a cup of vinegar.

24. Map taste buds by dipping Q-tips into different flavors and placing them on different areas of your tongue.

25. Explore the fat content of different foods by wiping them on a brown paper bag; fatty foods leave behind a greasy spot, while fruits and vegetables leave no trace at all.

Slime, Putty, and Oobleck Science Experiments for Kids

This soft, non-slimy putty even cleans your hands. Now that's a mom-approved science experiment.

26. You will be squeaky clean after creating this satisfying non-sticky putty by simply combining cornstarch and dish soap.

27. Whip up some Oobleck, a fascinating non-Newtonian fluid that can act a solid or a liquid depending on certain conditions.

28. Microwave Ivory soap (or any soap that floats) to create a bizarre puffy soufflé.

Outdoor and Nature Science Experiments

29. Grow a bean in a clear cup to watch the roots grow down and the stem grow up.

30. Craft a duck call by cutting the ends of a straw into a point, then blow.

31. Set up a row of bottles with varying amounts of liquid and then blow across the openings to hear the different tones.

32. Make a sundial by placing a stick in a vertical position and a circle of rocks around it marking each hour.

33. Cut ice in half using a fishing wire—the pressure melts the ice faster than the air.

34. Make a rainbow by holding a glass of water up to the sunlight with a sheet of paper behind it to catch the colors.

35. Create a tornado in a bottle by taping two plastic bottles together neck to neck—one filled, the other empty—and swirling it quickly.

36. S’more science please! Harness the power of the sun and turn a pizza box into a solar oven and roast some delicious treats for the whole family.

Science Experiments for Kids that Fizz, Bubble, and Foam

Make a beautiful volcano in your own kitchen!  Photo courtesy of Wikivisuals

37. Mix baking soda, vinegar, and glitter for a sparkly volcano.

38. Mix Diet Coke and Mentos and stand back to watch the explosion. (Really! Stand back.)

39. Drop Pop Rocks into a bottle of soda and then place a balloon onto the opening to watch it inflate.

40. Discover how to keep your pennies shiny by experimenting with different cleaning solutions. 

41. Make “elephant toothpaste” (a.k.a. an impressive large foam) soap, yeast, and hydrogen peroxide.

42. This glitter does more than shine, it sparks a scientific experiment to see how far germs can spread.

43. Baking soda and vinegar react to make these popcorn kernels hop around a jar of water. 

Physics and Physical Science Experiments for Kids

44. Learn about surface tension by dropping food coloring into milk and watch as the colors move when you add some soap.

45. Make a Rube Goldberg machine featuring a series of moving pieces that affect one another: marbles, dominoes, books, and most any surface.

46. Build a rocket balloon car using a Styrofoam tray, a balloon, and a straw; watch how air pressure moves it across the table.

47. Looking for hands-on science experiments? Ask your kids to do simple tasks with their hands, feet, and eyes ( grab a ball, stand on one foot, or wink) to see which side is dominant.

48. Test your reaction time by having a friend drop a ruler between two almost closed fingers. See how fast you can grab it.

49. Explore the scientific concept of density while taking a bath. Ivory soap boats do more than just float, they demonstrate density.

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All ages can enjoy tower building.

50. Engineer a tall tower using red party cups and sheets of paper. How high can you go? 

51. Fold a paper airplane and then bend a corner to see how that changes its flight path.

52. Find your blind spot by moving a card with a speck on it until you can no longer see the spot.

53. Build a miniature windmill using a few simple objects. Watch it spin faster or slower the direction of the “blades.”

54. Bounce a ball on top of another to watch how the energy transfers to the top ball and leaves the bottom one “dead.”

55. Demonstrate centripetal force by spinning a bucket of water on a rope in a vertical circle.

More Easy Science Experiments for Kids

56. Build a container for an egg that protects it from breaking and then test it out by dropping it from on high.

57. Fashion your own bouncy balls with this recipe to see how various shapes bounce differently.

58. Use a balloon to amplify sound by holding it to your ear.

59. Budding meteorologists can create shaving cream storm clouds and Technicolor raindrops.

60. Make static electricity by rubbing balloons on clothing or shuffling on the carpet with socks, then zap someone with a quick touch.

Grow gummy bears with a special science solution.

61. These gummies won’t be so yummy in your tummy, but you can watch gummy bears grow by placing them in water, saltwater, and vinegar.

62. Build your own periscope using a milk container and carefully angled mirrors that allow you to see things above or behind you.

63. Be a DIY spy with this fun fingerprint experiment. Collect fingerprints using one of these methods, and then dive a little deeper with a forensic study of fingerprint patterns.

64. Fill a plastic bottle to the brim with water and put it in the freezer; in a few hours the bottle will crack because ice expands.

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This article was first published in 2014, but it has since been updated. Additional reporting and photos by Ally Noel except where noted.