Little Blue is an intrepid little character who lives in an upturned boat with his mum and dad off the coast of Southern Australia. His friends are Rocky, a baby rockhopper penguin with a bright yellow crest, and Joey, a little kangaroo. His enemies are Fick and Fin the wisecracking sharks, and Big Grey and his gang of burly kangaroos.

Little Blue s cousin Penni is visiting and she thinks she is terribly funny. Little Blue s fed up with having jokes played on him. Now it s Penni s turn to have a joke played on her!