Try Rovables: pocket-sized robots that live on your clothes. The bots, developed by a team at the Massachusetts Institute of Technology and Stanford University, look like miniature cars with a custom-designed circuit board for a roof. With the help of magnetic wheels that pinch the fabric, they can roam freely up and down clothing for 45 minutes at a stretch, stopping in place to pose as a brooch or a bracelet. "I've never actually seen a robot that can independently drive itself around your clothing," says Rebeccah Pailes-Friedman, an associate professor at the Pratt Institute, New York. But the robots aren't just there to make you look cool. At this week's User Interface Software and Technology Symposium in Tokyo, the team described how Rovables could also have practical uses as sensors, digital displays, or for tactile feedback.