I agree, I just posted about a Numberblocks-based game!! I think blocks jumping onto or off each other to make bigger or smaller numbers is perfect for motion and so is reshaping rectangles with gestures to factorize various numbers. As for storylines, the arcade-like episodes in the show are perfect for the Nex-based games!!

Yes my 2 and 5 year old are obsessed with Numberblocks and are way ahead in their math skills because of it!! Numberblocks already has a very extensive iOS app with games so I’m sure some of them could be converted to control with your body.