Growing balloon experiment

Growing balloon experiment

This fun science experiment is a simple oe the kids can do own their own. 

What you need:

  • Quarter of a cup white vinegar (other vinegars do work as well)
  • 1 Tablespoon baking soda
  • Balloon
  • Glass bottle
  • Funnel
  • Measuring cup & spoon


Number of players:


Firstly measure quarter of a cup of vinegar into your glass bottle. Then using the funnel inside the neck of the balloon put 1 Tablespoon of baking soda into the balloon.

Carefully stretch the balloon opening over the top of the bottle, make sure you don’t tip in ANY baking soda.


Now… the fun part. Lift the balloon up, emptying all the baking soda into the bottle and watch what happens to the balloon. It grows & grows!!

Click here to watch the video of this experiment in action!


The vinegar and baking soda causes the bottle to fill with Carbon Dioxide and as it cant escape, it inflates the balloon.

It’s a really fun thing to do with the kids and very quick! Try adding food colouring to the vinegar to have colourful froth.

  • This blog was written by Gill Weavers, Kidspot Social member, for the Hasbro Month of Play promotion. 

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