Children are never too young to enjoy looking at and learning about dinosaurs Here they can see and read all about the massive plant-eater Brachiosaurus, which was as tall as the trees and as heavy as 12 elephants; the enormous wingspan of the flying Quetzalcoatlus, which made it as big as a small aircraft; and Ankylosaurus, which was the size of a tank and was protected by bony plates and spikes.