All he wants is a puppy, but he gets a triceratops instead! When a boy asks his mother for a pet, she says no. Then the boy finds a giant dinosaur egg at his neighbor's yard sale. The neighbor, Mr. Jerry, claims the dinosaur egg is real. That night, a baby triceratops hatches and leads the boy on a dinosaur adventure. "Do something," says Mom when her house becomes surrounded by a prehistoric herd. Soon the boy makes the dinosaurs disappear. And