Element83 is behind some of the coolest levitating sculptures we have seen. The Ingenuity kinetic Bismuth sculpture is also worth a look. Bismuth is diamagnetic, so it repels the north and south poles equally. Ingenuity not only looks elegant but lets you display levitation in any room.
This piece is very easy to set up. Just put the base on a level surface, slip the cube magnet between the crystals, and adjust the top magnet to adjust the floating distance.