The document outlines the developmental milestones in communication, motor, cognitive, and social skills from birth through school age and beyond. It describes the stages from crying and reflexes in infants to the emergence of babbling and true words in toddlers to full sentences and metalinguistic skills in school-aged children. Motor skills progress from involuntary movements to walking, running, and hand coordination. Cognitive development includes object permanence, pretend play, and the ability to think abstractly. Socially, children develop from distinguishing caregivers to engaging in social play and relationships.