Safari Ltd Four Dino Baby EggSafari Ltd Four Dino Baby Egg Dinosaurs, like all modern birds and most reptiles, laid eggs. Each egg contains a baby of one of following: Tyrannosaurus rex, was a meat eating theropod from the latest Cretaceous (68 66 million years ago) of western North America Triceratops, 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