V-Cubes
If you ever liked Rubik’s Cubes, check out these beasts: V-Cubes
The short version is that some professor figured out how to make Rubik’s Cube puzzles with sizes all the way up to 11×11x11. Right now his company is selling up to 7×7x7 “cubes” (they are actually slightly rounded), with larger versions in the offing.
I decided I just had to check these out, so I went ahead and ordered the set that includes the 5×5x5, the 6×6x6, and the 7×7x7. Should be fun!