Sam Gear Orbit Cube is the result of a collaboration between Sam Jiang (designer) and Calvin's Puzzles. This unique puzzle combines 2D and 3D rotational geometry. it is a 3x3x3 with four small circles on each face that rotate in the same direction as the face being turned. An example would be turning the R face 90 degrees clockwise resulting in spinning the small circles on the R face 90 degrees. 

In the event of a gear misalignment, you can remove the center cap to loosen the puzzle, realign the gear, and tighten the puzzle again.  

This is a very challenging puzzle that will also be tons of fun!