Gear Shift. You will be positively puzzled as you try to get a solid color on all six sides of the Gear Shift! This is no average puzzle cube, as the halves can be separated at the core in 3 different directions. Once the halves are separated, each of the 8 gears can spin independently, changing the shape of the puzzle. You'll have to shift your way of thinking about puzzle cubes to get your head around each brainbending block! This puzzle is deceptively difficult, all while the simple rotation of the eight meshing gears serves as a mesmerizing display. Once you discover that the core can be pulled apart, the difficulty skyrockets! What was once an inevitability now truly becomes a challenge of logic. Materials: Plastic. Dimensions: 7.5"L x 4"W x 7.5" H; Weight: 0.5 lbs.