Plot: Rumbly Tumbly: Nick's hungry tummy is rumbling! But why do our stomachs make noises when they're hungry? A super shrunken trip into Thing One's stomach will show them the answer! They learn how chewing and stomach juices help to break down the food, and the tummy sounds are actually the stomach working. When your tummy is empty, the sounds are much louder! There's only one way to quiet Nick's rumbly tumbly