The Water Horse by Dick King-Smith

The Water Horse

It all starts when Kirstie and her brother Angus find a mysterious egg washed up on the beach the night after a huge storm. They decide to take it home, and that’s where their adventure begins, as the next day it hatches into a tiny green-grey creature with a horse’s head, warty skin, four flippers and a crocodile’s tail. The baby sea monster soon becomes their family pet. But there’s just one problem . . . it won’t stop growing!