Bottle Organ

Blow across the top of bottles filled with different amounts of water – and tune them into a real scale.

Time: 20 min
Age: 5–12 years
Energy: Calm
Where: At home

This is the physics of sound you can hear: the more air in the bottle, the lower the note. Tuning the bottles by ear is great listening practice, and getting a clear note takes a little persistence.

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.

Join the waitlist

Coming soon to the App Store and Google Play

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