10 Great Fourth Grade Apps You Need Now

6 of 10

Crazy Machines

The mad scientist in charge of this crazy lab might give Einstein a run for his money!

Players start by solving simple tasks and participating in experiments, so they can get a grasp of concepts like propulsion or momentum. Logic puzzles are this app’s bread and butter, but it also introduces simple physics concepts. There’s much to love about this app, which celebrates imagination and creativity.

Get it on iTunes!