The Twisted Cubes are a shape-modification of a 3x3 Rubik's Cube. This makes them a bit more interesting to solve, and much cooler-looking when scrambled. Now you can get your very own DIY version of the Twisted Cubes. Save $10 when you buy both together!
You can get stickers for the puzzles at Oliver's Sticker shop: http://oliverstickers.com/stickers-for-shapeways-puzzles/eitan-cher
You will need a total of 12 M3 screws at least 10mm long.