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The Helicopter Cube is a twisty puzzle with slices allowing all 12 edges of the puzzle to rotate. Each edge can be rotated 180 degrees to scramble and solve the puzzle. A special move is possible after a partial rotation, allowing the puzzle to "jumble", a very special property making the Helicopter Cube unique among mass produced puzzles. Hand made versions have been much sought after by collectors. The Helicopter Cube was conceived by Adam G. Cowan in 2005, but wasn’t built until 2006, when Adam discovered that 3D printing could be used to realize the parts.