Expanding Balloon Science Experiment

My kiddos love science projects, and this Expanding Balloon Science Experiment did not disappoint!

Expanding Balloon Science Experiment


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Begin by gathering your supplies!

Expanding Balloon Science Experiment

All you need is vinegar, baking soda, a water bottle, a balloon, and a plastic bin to contain the mess: optional – Around here, we don’t mind a little mess.

Step-by-Step Instructions:

  • Fill 1/3 of the water bottle with vinegar.

Expanding Balloon Science Experiment

  • Pour approximately 1 tablespoon of baking soda down in the balloon. (A cup with a spout or a funnel comes in handy here!)

Expanding Balloon Science Experiment

  • Attach the balloon to the water bottle and watch the balloon expand!

Expanding Balloon Science Experiment

Don’t be afraid to let your kids try this experiment multiple times – each time adjusting the amount(s) of baking soda and vinegar (more or less)! That’s part of the fun of this experiment!

Expanding Balloon Science Experiment

I always keep an extra-large bag of baking soda (from Sam’s) and an extra-large jug of vinegar (from Target) on hand. Not only are these ingredients great for science experiments, but I also use a mixture of the two in my laundry as well as when I’m cleaning in the kitchen.

If you enjoyed this activity, you might also want to check out my Erupting Pumpkin Science Experiment:

Erupting Pumpkin Experiment

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  1. My kids love this one too. Also fun to compare side by side with yeast, sugar and warm water one done the same way.

    1. thislittlehomeofmineblog@gmail.com says:

      I’m so glad you shared that! We will have to try it!

  2. I’ve done this with my girls and they loved it! Anything with balloons right?! lol

    Pinning this to my Deliberate HOMESCHOOL board.

    Wishing you a lovely day.

    1. thislittlehomeofmineblog@gmail.com says:

      Yes, yes, yes! Always a hit around here, too! 🙂

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