Gear Cube Extreme
If you think that solving the Rubik’s Cube is challenging, you haven’t seen anything yet. This puzzling predicament adds 3D elements to the standard puzzle cube to drive you crazy. The Gear Cube Extreme is like the original Gear Cube but tougher.
I’m getting a headache just looking at this one. You can change any piece with any other piece on the cube. I don’t know about you, but I’m already stumped.
Well worth the $44.99 price from Amazon.