Little Brother - called L.B. for short - comes from a loving family, has a good friend, and loves to eat mashed potatoes. In fact, he thinks mashed potatoes are so good, he wants to eat nothing else. His parents try to explain to him that too much of anything is a bad thing, but L.B. doesn't want to listen. When L.B. disobeys his parents, he learns the hard way why he should trust them and how you really CAN have too much of a good thing.