Bulbous Burr is a six-piece burr puzzle, but not the
classic type. Some of its pieces are circular. Still, the puzzle is easy to solve and it looks quite nice.
Watch the
YouTube video.
Read at the
Shapeways Forum.
Read more at the
Non-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 multi-colored sample of this puzzle.