Hollow 2x2x2 is a 2x2x2 Rubik's Cube that has been hollowed out. The puzzle has a rails mechanism that keeps the parts together. One corner acts like a core surrounded by seven corners. There are nine hidden edge rails and three hidden centers.
Watch the
YouTube video.
Read at the
Shapeways Forum.
Read more at the
Twisty Puzzles Forum.
Please order a 3D-printed do-it-yourself puzzle kit from Shapeways at this page (check with Oskar about screws and stickers), or
contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.