OMPIC is a fun and frustrating wooden puzzle by Vinco.
Four wooden pieces fit together to form a cube, that is the easy part! The real challenge is to assemble them into a cube inside the wooden frame. The frame is built at an angle giving it a strange four dimensional feel and adding to the difficulty.
A nicely made neat wooden puzzle with a cherry cage and various hardwoods used for the pieces.
OMPIC measures roughly 60mm in diameter. The solution is included.