Hi Shapeways fans, Quartolabacus is a twisty puzzle inspired by John D. Harris' classic Astrolabacus puzzle. Each of the six segments of Quatrolabacus has four channels. The puzzle can be twisted, which results in a rearrangement of the channels. The beads slide through the channels. The object of the puzzle is to scramble it and then solve it. Watch the YouTube video. Buy the puzzle at my Shapeways Shop. Read more at the Twisty Puzzles Forum. Check out the photos below. Enjoy! Oskar