Dinosaurs, like all modern birds and most reptiles, laid eggs. This Dino Baby Egg set toy set consists of eggs and babies of four different dinosaurs: Tyrannosaurus rex was a meat-eating theropod from the latest Cretaceous (68-66 million years ago) of western North AmericaTriceratops, was a herbivorous horned dinosaur, also from the latest Cretaceous Period of western North America Stegosaurus was a herbivorous armored dinosaur from the Late Jurassic Period (155-150 million years ago) of western North America Brachiosaurus was also from the Late Jurassic Period of western North America Size and Color: Each egg in this Dino Baby Egg set toy is 3.5 inches long and 2.5 inches wide. Each dinosaur is 2 inches long. The dinosaurs are colored in brown or gray to allow them to blend into the background for protection. The Dino Baby Eggs Set is part of the Wild SafariÂ® Prehistoric World collection. All of our products are Non-toxic and BPA-free.