Whereabouts are you from? ambien side effects racing heart Children's stories are best – and most childlike – when they are propelled by fear. That is why the most famous fairy tales involve death and the forbidden: children love the notion of children outwitting the exciting threats posed by the natural and supernatural order, and many a great tale, from Hansel and Gretel to Peter Pan to Harry Potter, involves children pulling together to defeat the threat of what they don't really understand.