Thing: A little girl finds what she thinks is a very pretty rock. It turns out to be a prehistoric egg, and when it hatches, she finds herself the proud new owner of a pet stegosaurus, which has some drawbacks. The Steam Train Crew: A hill covered in ripe blackberries is just too much temptation for the crew of a steam train. While they are gathering the fruit, the engine gets away, leading the crew on a merry chase. Whiska: When Whiska pops out of a hole in the ice near the South Pole, she spies what would warm any seal’s heart – something which appears to be a bright red ball.