This reptile, with its iconic sail-shaped back, is often mistakenly identified as a dinosaur, and is even included in packages of toy dinosaurs.

Children are more willing to help if you give them simple directions, such as, "you put all the dinosaur toys in this box, and I'll put the crayons in the basket."

They almost never show up in the movies or nobody makes plastic toys of them, but they are the stock from which the greatest plant eating dinosaurs evolved.