Shaggy and Scooby have made the gang late to the Museum of Natural History because they just HAD to have some pizza. While Velma, Daphne, and Fred are looking around the museum, Shaggy and Scooby decide to chow down in the museum's cafeteria. But suddenly the skeletons of all the animals in the museum come to life. It's up to Scooby-Doo and the gang to save the day!.