Back in 2011, we shared Dror Benshetrits cool modular, sculptural building blocks called Quadror and since then Dror has been hard at work making all kinds of stuff from these structural units, including sculptures and now toys. The blocks flat planes and interlocking joints encourage children and adults alike to view geometry as play. They come in two sizes and four colors. Im pretty sure that if I got these for Amelia, Id spend just as much time playing with them. Buy them at Module R.