Early childhood is a time of remarkable physical, cognitive, social and emotional development. Infants enter the world with a limited range of skills and abilities. Watching a child develop new motor, cognitive, language and social skills is a source of wonder for parents and caregivers.The study of Child’s development is a rich and varied subject. We all have personal experience with development, but it is sometimes difficult to understand exactly how and why people grow, learn and change. Developmental psychology seeks to understand and explain how a child grow and change through the entire lifespan