Discover key infant milestones from birth to 12 months. Learn how rolling, sitting, crawling, and tummy time build strength, coordination, and confidence.

Between ages 1–5, children experience huge leaps in coordination, balance, and confidence. From standing on one foot and climbing playground structures to hopping, galloping, and skipping, these early motor skills form the foundation for school readiness and lifelong movement. This guide breaks down each year’s milestones with simple, expert-backed Q&A to help parents support growing bodies through playful, developmentally aligned activities.

Learn how your 9–12 month old develops pulling up, cruising, balance, and first steps, building confidence and early mobility through play.

Discover key infant milestones from 0 to 3 months, including first smiles, cooing, improved head control, tummy time progress, early rolling, and social engagement. Learn what’s typical, how to support your baby’s development, and when to reach out to a pediatrician or physical therapist for guidance.