4Cubes is based on an idea by Tony Fisher (and a parallel invention by Sergey Abramenkov). It uses a simplified version of the YouCube mechanism. The puzzle looks like four Rubik's Cubes on a ring. The slices of each of the four cubes turn, but it is also possible to swap around little cubies between the four big cubes.
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.