In "What Babies Say Before They Can Talk: The Nine Signals Infants Use to Express Their Feelings," Paul C. Holinger, M.D., M.P.H., discusses nine simple "signals" that babies use to express their feelings: These signals are: interest, enjoyment, surprise, distress, anger, fear, shame, disgust, and dissmell. The author explains how children are born knowing how to communicate their feelings with these symbols, and that adults need to take the time...