Your four-year-old: Wild and wonderful

What is it about four-year-olds that makes them so lovable? What problems do four-year-olds have? What can they do now that they couldn't do at three? Drs. Ames and Ilg, recognized authorities on child behavior and development, discuss these and scores of other questions unique to four-year-old girls and boys, and they offer parents practical advice and enlightening psychological insights.