Tim's midwinter present came in the mail on Monday, was waiting for us when I arrived back at my apartment yesterday, and was a great success. 216 spherical magnets called Buckyballs [not the same as the fullerene], which are solely for playing with. We sat on the floor for an hour, looking for stable configurations. Pentagons and cubes were very stable, long strands the most stable. [Buckyballs have two poles, just like a bar magnet.]