We've certainly seen plenty of swarm robots before, but few of those are cheap enough to let you easily build something that can truly be called a "swarm." These so-called Kilobots developed by Harvard's Self-organizing Systems Research Group, however, can apparently built for just $14 apiece, and can each be assembled in just five minutes to boot. Despite that low cost, the bots are still capable of plenty of swarm-like behaviors, including the ability to follow the leader, disperse in an environment, put on a synchronized LED light show. Head on past the break for a pair of videos.