The key stages of child development include physical, cognitive, emotional, and social development, typically categorized as infancy (0–2 years), early childhood (2–6 years), middle childhood (6–12 years), and adolescence (12–18 years). At TechSix – Preschool & Daycare Excellence, we focus on nurturing each of these stages through age-appropriate activities that promote holistic growth in a safe and engaging environment.