George Callison, an expert on dinosaurs, and an artist, sketches and makes notes for upcoming dinosaur models and exhibits in front of a Tyrannosaurus Rex head at the Dinamation factory in Los Angeles, California. Dinamation International, a California-based company, makes a collection of robotic dinosaurs. The dinosaurs are sent out in traveling displays to museums around the world. The dinosaur's robotic metal skeleton is covered by rigid fiberglass plates, over which is laid a flexible skin of urethane foam. The creature's joints are operated by compressed air and the movements controlled by computer.