Self-Inflating Balloon

Baking soda in the balloon, vinegar in the bottle – put the balloon on and watch it grow without blowing.

Time: 10 min
Age: 4–10 years
Energy: Calm
Where: At home

The carbon dioxide from baking soda and vinegar has nowhere to go, so it fills the balloon. Your child sees that a gas is something real, even though it’s invisible.

The steps are in the app

Step-by-step instructions, tips and an easier and a harder version are waiting in the Hopsa app – along with 300 more ideas matched to your kids’ ages.

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Coming soon to the App Store and Google Play

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