This document summarizes child development between the ages of 3-4 years. During this period, children are transitioning from babyhood to childhood. They have active imaginations and may have fears. Socially, they begin playing cooperatively with other children, learning to share and take turns. Physically, they gain skills like riding tricycles, throwing and catching balls, and cutting with scissors. Language development involves talking in sentences and asking questions. Most children will be toilet trained by age 4, though some wetting may still occur. Parents are encouraged to provide opportunities for physical activity, creative play, and social interaction to support healthy development.