Sweet Lips the robot guide takes visitors through the Hall of North American Wildlife, near the Dinosaur Hall in the Carnegie Museum of Natural History in Pittsburgh, PA. Carnegie Mellon University robotics professor Illah R. Nourbakhsh's creation draws children like a pied piper by speaking and playing informational videos on its screen. It navigates autonomously, using a locator system that detects colored squares mounted high on the wall. A color camera and scores of sonar, infrared, and touch sensors prevent Sweet Lips from crashing into museum displays or museum visitors. From the book Robo sapiens: Evolution of a New Species, page 220-221.