10cm egg Suitable for age 3+ Hatches in 72+ hours Dinosaur continues to grow to 16cm Dinosaurs hatched from eggs!  Possess your own green Triceratops egg, pop the egg into a bowl of water and watch as the baby dinosaur hatches out of the egg and grows! The egg will hatch in 72+ hours once submersed in water. Once the dinosaur has hatched, leave it in the water for a couple of weeks and the dinosaur will continue to grow to up to 16cm!