Anti gravity device

Have you ever seen a wheel rolling uphill, neglecting the laws of gravity? You can by realizing this interesting desktop gadget.
A small neodymium ring magnet (d=10mm, t=5mm) is attracted by a row of ten even smaller (5x5x5mm) cubes, hidden under a rail.
http://www.supermagnete.nl/
Make sure the orientation of the cubes is correct. The easiest way is to take the ring magnet between two fingers, and bring it in contact with one cube. The cube will position itself and can be pushed into its