This document discusses human growth and development in early childhood from ages 1.5 to 6 years old. It covers the physical, cognitive, psychosocial, and social developments that occur during this period. Key developments include refining of motor skills, expansion of language abilities, emergence of moral reasoning and social skills through play, and establishing independence. Theories from Piaget, Erikson, and Kohlberg are referenced to explain cognitive and socioemotional milestones. Parenting styles and their influence are also covered.