Rexy is Caillou's stuffed dinosaur. He was only seen during the Puppet segments in Season 1. Rexy is a light blue color. He is very playful and also has some speech impediment. If somebody teases him about it, he gets very upset. During the puppet segments of the show, Rexy likes to pretend he is an explorer and wants to go around the neighborhood. Rexy also plays with Deedee a lot too. Rexy has been seen in Caillou's room after Season 1 but he hasn't ever had any speaking lines since the puppet segments ended. The three other puppets with him aren't his real family, but he still lives with them. He is a good artist. He is a toy that Caillou bought from a store. Rexy does have a short book on him that sometimes appears at the end of the show.