Refer to "Pleo" as a robotic pet, and its co-inventor, Caleb Chung (of Furby fame), will quickly set you straight: Pleo is a designer life-form. That's because, on the outside, everything about the one-week-old Camarasaurus is very unrobotic. Its movements are fluid, not rigid; its actions are seemingly spontaneous and unprogrammed; and its skin is smooth, seamless and stretchy. Inside, however, the 3.3-pound Pleo is very robotic indeed.