Rotabram is a Doug-Engel-style flat twisty puzzle, conceived and designed by Bram Cohen and me. When parts are turned, the small gears are changing orientation and the black hexagons are broken. The object is to scramble the puzzle and then to get the puzzle back to its starting state.
Watch the YouTube video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
Please contact Oskar directly if you want to obtained a fully dyed and assembled sample of this puzzle.