Hopsa
This is a non-Newtonian fluid – sometimes it acts like a solid, sometimes like a liquid. For little kids it’s pure magic and one of the best sensory activities around; for older kids it’s a great intro to physics.
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
