Five-year-old Sammy has a big question: What's a belly button good for? Determined to find the answer, Sammy decides to ask his friends if they know. Johnny has no idea what a belly button is good for. Neither does Susie, the smartest girl in kindergarten. His big brother, Ricky, does not know either. When his sister and father do not seem to know the answer, Sammy heads into the kitchen where he finally finds the person who he thinks knows everything--his mother. But will she have the answer? In this charming children's book, a curious little boy determined to learn the purpose of his belly button discovers that his question may be more difficult to answer than he thought.