Tunnel Cube can be considered the inverse of Adam G. Cowan's
Handlebar Cube. Whereas Handlebar Cube has three handles at the outside that bandage non-adjacent corners and edges together, Tunnel Cube has three tunnels that achieve the same effect. The holes enable you to look inside the puzzle and to see which corners and edges are bandaged through these tunnels.
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.