Bouncy Egg

A raw egg in vinegar loses its shell, and after two days it turns rubbery and bounces.

Time: 10 min
Age: 5–12 years
Energy: Calm
Where: At home

Vinegar dissolves the calcium shell, leaving only a stretchy membrane. The experiment takes a few days – great practice in patience and checking in every day.

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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