Saurus St is just like any other street ... except for the dinosaurs! What bad luck! Just when Sam's finished his homework a pterodactyl flies through the window and steals it. Poor Sam. It's the fifth piece of homework he's lost this month. He's got to get it back. With the help of big brother Nathan, Sam builds a pterodactyl suit and sets off for Saurus Hill. But there's an egg - shaped surprise in store for them up there.