Give all the little dinos at your party a treat before they leave. The Dinosaur Party Favor Kit (for 1 Guest) comes with a pencil, tattoo book, stickers, stamp and a solid color notepad. Tyrannosaurus Rex, Triceratops and Stegosaurus are all featured on the sticker sheet. The tattoo book features 10 tattoos off different dinos. The T-Rex and Triceratops both lived in North America around the same time, the Cretaceous Period about 65 million years ago. While many kids love to have them battle each other in pretend play, scientists are not sure if they ever really did. Stegosaurus lived during the Triassic Period, millions of years before the Cretaceous. They may not have all lived together in the past, but they do during pretend play.