I highly recommend going through Oskar's other puzzles and contraptions which includes tons of very very strange cubes, puzzle rings and other oddities: https:

I highly recommend going through Oskar's other puzzles and contraptions which includes tons of very very strange cubes, puzzle rings and other oddities: https://www.youtube.com/user/OskarPuzzle https://www.youtube.com/user/OskarPuzzle http://oskarvandeventer.nl/hanayama.html http://oskarvandeventer.nl/hanayama.html He also has done a ton of collaborations with Bram Cohen of Bittorent fame like this one: https://www.youtube.com/watch?v=RTcGCqz4ajs https://www.youtube.com/watch?v=RTcGCqz4ajs He's definitely one of those guys who just can't stop creating puzzles and new ways of thinking about problems.