GeoCentral Excavation Dig Kit: Dino Egg w/Skeleton The package contains an earthen egg, a digging tool, a brush, and a base. Whatever the source, your plaster egg will be a 3-1/2" tall oval with a plastic dino skeleton embedded inside, waiting to be freed and assembled. You get a wooden chisel and brush for excavation and a small wooden stand to display the resulting T-Rex, triceratops, spinosaurus, brachiosaurus, stegosaurus, pterodactylus or velociratops, depending. We'll pick a pair because everyone likes a surprise.