There are a series of "GrowCubes" by the same author -- if you haven't played them, explaining is difficult. But the general idea is, you start with a cube (not always a "cube" per se, depending on version) and proceed to click on one of several items. Depending on the order they're clicked, different growth combos will happen on the cube you started with. Clicking them in the proper order (difficult and time consuming to deduce!) will get you the final product -- until then, you just get different combos and watch it grow.
It's absurd, addictive and immensely challenging. Oh, and fun.GrowCube v 3GrowCube
He has a bunch of other really . . . interesting stuff. The GrowCubes are my favorite though.