Hopsa
A falling object has to push air out of the way, and a wide canopy pushes so much air that the air pushes back and slows it down. A fair test – same toy, same height, only the canopy changes – is the core of every real experiment.
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.
Coming soon to the App Store and Google Play
