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Pre-K to kindergarten (4–5 years): school, sleep and development

Stage: 4–5 years

Sleep

usually no nap needed any more

Feeding

Eats fully with the family; school rhythm now also means a healthy lunchbox and snacks. Stay cautious with sugary drinks — water is the norm for school.

Diaper size

Almost always dry day and night.

Development at this stage

• Tells coherent stories
• Hops, balances and climbs confidently
• Recognizes letters and numbers, may write own name
• Plays cooperatively with clear rules
• Increasingly able to empathize with others

Care & things to watch

• Kindergarten: compulsory school age varies by state (5–7), but most children start kindergarten at 5 — check your district's cut-off date (often September 1)
• School-entry requirement: the 4–6 year boosters (DTaP, IPV, MMR, varicella) must be documented for kindergarten enrollment in most states — not done yet? Book the 4- or 5-year well-child visit
• Swim lessons: the AAP recommends swim lessons for most children from around age 4 (from age 1 they can already help reduce drowning risk) — drowning is a leading cause of death for young children in the US
• Booster seat comes later: keep the forward-facing harness seat until its height/weight limit before moving to a belt-positioning booster (NHTSA)
• Vision and hearing screening at the school-entry well-child visit
• Practice traffic safety actively: walking together, naming safe crossing points
• Build the school rhythm: a fixed bedtime matters more now — a kindergartner still needs 10–12 hours of sleep a night

Other ages: 0–6 weeks · 6–12 weeks · 3–4 months · 4–6 months · 6–9 months · 9–12 months · 12–18 months · 18–24 months · 2–3 years · 3–4 years