For the "Easily Amused" file
SPINNY THINGS!!!
Lovely little homopolar motors made with a single AA battery, a magnet, and some bits of wire. 2nd video is a little more elaborate (requires Canadian coins) but still pretty simple and very, very cool.
Lovely little homopolar motors made with a single AA battery, a magnet, and some bits of wire. 2nd video is a little more elaborate (requires Canadian coins) but still pretty simple and very, very cool.