Rex is a Tyrannosaurus. One of the biggest and scariest dinosaurs. Find out what could happen if Rex came to your next birthday party! Bright and bold with simple facts presented in a fun and lighthearted way, this series has been specially crafted to entertain the pre-schooler who is fascinated by the prehistoric world. Most kids catch Dinosauritis - soothe their fever with Jeannette Rowe's vivid picture books that combine facts with fun.