Collectible 3-Pack includes the following dinosaurs: Mrs. Pteranodon, mother to Buddy, Tiny and Shiny. Shiny is part of the Pteranodon family and is more "girly" than Tiny and very proud of her shiny surface. Derek is a friendly Deinonychus. All characters can fit into the Lights and Sounds Train (sold separately) for added play. Based on the Jim Henson PBS show, the Dinosaur Train collectible segment enables children to collect all of their favorite Dinosaur Train characters, while also expanding their train set.