There's one thing - one very important thing - that Molly and Dad both know about polar bears that live on the Arctic ice, crocodiles with their whip crack tails, dinosaurs whose jaws could swallow a school. Young children should love joining in their bedtime game to see if they can guess what the one thing is.There's one thing - one very important thing - that Molly and Dad both know about polar bears that live on the Arctic ice, crocodiles with their whip crack tails, dinosaurs whose jaws could swallow a school. Young children should love joining in their bedtime game to see if they can guess what the one thing is.