Rubi, a teacher’s assistant at the Early Childhood Education Center in San Diego, has eyes sometimes in back of her head, along with antennas and a couple of microprocessors. The robot is part of an experiment at the University of California San Diego to study how robots and humans interact. Rubi is capable of tracking heads, detecting faces and interpreting basic expressions. Additionally, it can teach songs and–through the touch-screen–conjure up interactive games.