This document discusses social-emotional development in children from infancy through early childhood. It describes how social-emotional development involves a child's experience and expression of emotions, and their ability to form relationships. Key aspects of healthy social-emotional development include positive relationships with nurturing caregivers, the ability to identify and manage emotions, develop empathy, and interact positively with others. The document notes that social-emotional skills are as important as cognitive and physical development for children's overall growth.