Shrek (so named by a nephew) is a Pleo - an advanced dinosaur robot. He can walk, make noise and react to life forms around him. (He also knocks over empty soda cans in his path.) He has advanced sensors all over his body and he knows when you are petting him. Evidently, Pleos can adapt and learn over time. He really is incredible to see. Shrek was a gift from the DH & I to our Spanish nieces & nephew. I want one now, too!