Hanayama Puzzle: O'Gear

A prize winner from the 2001 1st Annual World Puzzle Design Competition, this puzzle was designed by the young Dutch phenomenon, Oskar, considered to be one of the world’s brightest creators. The gear exhibits a unique kind of movement. Once together in its final form of beauty, the gear fixed in place in the cubic box could very well serve as a desk decoration to satisfy a kind of smoothing, intellectual curiosity.

The key word is "teeth"

Difficulty 3 stars