This colorful maxi egg will delight both boys and girls. A surprise dinosaur is hidden inside the egg. To hatch the dinosaur, submerge the egg in a bowl of lukewarm water. After approximately 24–48 hours, the shell will crack and the dinosaur will start to emerge. Children can gradually watch the dinosaur hatch from the egg. Will it be a T-Rex, a Stegosaurus, or a Brontosaurus? Or a completely different dinosaur? They’ll find out in about 72 hours.