In Magic School Bus chapter book #9, Ms Frizzle and the gang find out they must become Dinosaur Detectives at the Museum of Natural History. Ms Frizzles and the gang just want to study dinosaurs at the Museum of Natural History. But by mistake, they end up traveling through time to the actual Mesozoic era and come face to face with real meat-eaters! Yikes! They learn about the differences between all kinds of dinosaurs and the different eras these creatures roamed to earth. Don't miss their exciting chase with a T-Rex and their race to get back home! Read how the Magic School bus kids become real Dinosaur Detectives.