Walking "Caterpillar" Gel...

Forget electronics, the coolest thing in robotics...  ...ronment. This is based on an oscillating chemical reaction called the Belousov–Zhabotinsky ( BZ) reaction . The result is an autonomous material that moves...  ...tely losing and gaining electrons in the cyclical reaction...

http://www.neatorama.com/2009/06/02/walking-caterpillar-gel/