Child development refers to the biological, psychological and emotional changes that occur from infancy through adolescence. It involves progress in gross motor skills, fine motor skills, cognitive abilities, social-emotional development, speech, and language. Understanding child development and psychology is important for caregivers to provide a nurturing environment that supports healthy development and to understand the reasons behind children's behaviors. Studying childcare courses can help parents and professionals gain knowledge about child development milestones, psychology, and childcare best practices.