Inventor: Oscar Van Deventer
ST (solve time): ~1-2 h
Just looking at it, one isn't likely to figure out how this puzzle works until you actually have a go with it. Basically, the gear doesn't just came off when you lift it, but can be turned to other faces. It can rotate 90 degrees in one specific direction on any faces, so it can walk over all faces of the box. However, its movements are limited, because some of the sides are straight, and not curved. To cut a long story short, this is a somehow complicated 3-D maze.
Two of the gears have a part of them being thinner than usual, and this is the key to the solution. One of the face is different than the others, and getting the correct point of the gear to the correct face in the correct direction will free the star. Unfortunately, this is easier said than done. There's two ways to solve a maze puzzle-to use the trial-and-error method, or try to make logic out of it and make a map. As with this puzzle, it can be solved using a mathematical approach-I'll explain it later.
My scribble notes about O'gear's route
Okay, if you are not asleep yet, my last paragrappppph..
This puzzle was a nice maze, with a great concept. No waste of your money on this one! The top face has two holes that holds the puzzle nicely together, and a great coffee table piece it will be.
P.S The puzzle is available from Puzzle Master here.