Back in the eighties, the Rubik's Cube was quite a craze - everyone had one of these puzzles. The popularity of the cube has significantly waned since then, but occasionally variations will crop up.

This cube has 7 squares per edge (that makes 49 per face, right?) and it is described as having "19.5 duoquinquagintillion permutations."

Hurts my brain just thinking about it!