A reader sent David a link to this youTube video showing a Magnet Machine by Dave Johnson. What fun!
The motion and mechanism are fascinating but also pay attention to the sounds. People often inquire about the sounds David's sculptures make and it regularly affects buying decisions. It is important to design for the auditory sensory experience as well as the visual.
If you haven't yet played with the Rare Earth magnets you might miss some of the excitement in this ingenious machine. We have a set of the Bucky Balls and everyone enjoys fiddling with them. No one ever gets them back into the cube but creating chains like those used in Dave Johnson's machine is entertaining.
Thanks to Dwight Souder for the link.