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Pop Rock Science Experiment for Kids

Whether you try this during your homeschool year, at a science birthday party, or as part of a summer science bucket list for kids it will produce the same results – a really cool science experiment kids will LOVE.

Pop Rocks Science Experiments - This is such an EPIC summer kids activities, perfect science project for your summer bucket list. This is FUN, easy to do, and perfect for kids of all ages. #scienceexperiment #sodaexperiment #kidsactivities

Pop Rock Science Experiment for Kids

Kids love doing science experiments that wow and amaze. This candy science experiment will wow, amaze, and teach all at the same time! Kids in Kindergarten, 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade will enjoy this experiment. I first saw this experiment at Steve Spangler Science.

Pop Rock candy Scienc Experiment for Kids

Supplies Needed:

  • Pop Rocks (1 envelope per bottle of soda + 1 for placebo + one for the kids to taste) Note: We found it easier just to buy them from Amazon as many stores don’t have pop rocks in stock any more.
  • Balloons (1 balloon for each bottle of soda)
  • Soda (1 liter bottle – you may want to try several different ones and have kids hypothesize which one will work best)
  • Cool Science Gear for Kids (optional, but totally cool)
  • Kid Science Kit (again optional, but so much fun!)

Homeschool Science is FUN!

First you need to pour an entire envelope of pop rocks into each balloon being used. (We used 4 bottles, so 4 balloons).  We did this easily by having me spread the balloon open and my 9 year old pouring them in. For younger children you can use a funnel.

pop rock candy is fun

Then I let my curious kids try pop rocks. My 3 year old was particularly curious, confused and then delighted by this most unusual candy!

Pop Rocks and Soda

Pop Rocks and Soda

Next we tried the basic experiment without the balloons. What would happen if we poured pop rocks into water. What happens if we pour pop rocks into soda. The kids were amazed at the poping noise and the fizz from the soda, but that was it. Now for the fun part . . . .

Pop Rocks Science Experiment


We carefully removed the lids from our four soda bottles and put the balloon over the opening being careful not to pour the pop rocks in until all the bottles were ready. We then had the kids hypothesize which soda they thought would inflate the balloon the biggest, fastest, etc.

The kids were super excited about this experiment.

Summer Science for Kids

What Makes a Pop Rock POP and Inflate a Balloon?


So besides being a really cool science experiment and a great way to show kids about the scientific method, what did they learn?

Apparently, Pop Rocks have small carbon dioxide bubbles inside. That is what makes the candy “pop”. Carbonated Beverages also have carbon dioxide in them (that is what makes them carbonated). When the pop rocks are dropped into the soda the carbon dioxide is able to separate from the high fructose corn syrup (which sweetens the soda). Because the carbon dioxide has no where to go it rises up, filling up the balloon.

We explained to the kids that if this were a real scientific experiment you would need to repeat the experiment to validate your findings.

Personally , I wanted to try it with “diet” soda to see if the carbon dioxide in the soda could release the same way if there was not high fructose corn syrup. If you try it before I do, I’d love to know what you find!

Coke has the most carbon dioxide of all the sodas we tested

Minnie (my 6 year old) hypothesized correctly and “won” our balloon race.  All 4 balloons did inflate, but not equally. In our experiment we found the regular Coke did the best with regular A&W Root Bear coming in a close 2nd. Sprite did fine and surprisingly (at least to me) Mountain Dew barely inflated the balloon.

TRY THIS! —-> Have your child taste the soda after the experiment – all the sodas will be flat.  Why? Remember what makes soda carbonated is the trapped carbon dioxide, but you released that in the experiment to fill the balloon so the carbonation is gone.


100 Amazing Food Experiments for Kids - so many clever edible science projects for kids of all ages to explore chemistry, biology, physics, and earth science! #scienceexperiment #scienceproject #kidsactivities capillary-action-science-experiment-for-kids DIY Lava Lamp - super easy way to make your own lava lamp with simple things you have around your house. This homemade lava lamp is such a fun science project for kids of all ages to sneak in some summer learning. This science experiment is for toddlers, preschoolers, pre k, kindergarten, first grade, 2nd grade, 3rd grade, and kids of all ages at home, homeschool, summer camps, classroom, etc.

Science for Kids

Looking for lots more fun, science experiments for kids? You’ve GOT to try some of these outrageously fun science experiments for kids! We have so many fun, creative and easy science experiments for elementary age children:

This amazing color changing slime is going to blow your mind! This heat sensitive slime will actually change color as your kids touch it because it is heat sensitive! This is a super cool project for kids you MUST TRY! Must try summer activity for kids to add to their summer bucket list  Help kids learn about what is under their skin with this fun, interactive, and hands on human body project for kids from toddler, preschool, pre k, kindergarten, first grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade students. This can be a simple life size human body project or use our free printable templates to add bones of the body, organ templates, and more. This engaging science project is EASY and LOW PREP too.  dying flowers science experiment

About the author

Beth Gorden

Beth Gorden is the creative multi-tasking creator of 123 Homeschool 4 Me. As a busy homeschooling mother of six, she strives to create hands-on learning activities and worksheets that kids will love to make learning FUN! She has created over 1 million pages of printables to help teach kids ABCs, science, English grammar, history, math, and so much more! Beth is also the creator of 2 additional sites with even more educational activities and FREE printables - www.kindergartenworksheetsandgames.com and www.preschoolplayandlearn.com


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