This particular guy is a solar powered sun seeking robot. It has a tiny solar panel and will actually follow the sun. And it moves fast too, at one inch per second. And since it's solar, it requires no batteries - bonus! It teeny tiny! Not much bigger than a quarter, and it was made from computer and phone parts! I went to their website ( http://www.robots.stonepile.org/ - the one listed in the picture) to watch the video. Pretty cool stuff! Middle also has different tiny robots listed in their shop, including one that makes noise, and one that looks like a caterpillar!