Childhood development timeline
From IKE
4 months: Tongue extrusion reflex extinguishes
6 months: Solid foods
8-12 months: primary teeth erupt
12 months: Drinking from cup
Red Flags
- Age (months) Clinical Observation
- 2 Not turning toward sights or sounds
- 4–5 No social smiling or cooing
- 8–9 Not reaching for objects or reciprocating emotions/expressions
- 12 No signs of expression or immitative sound exchange with caregivers
- 18 No signs of complex problem-solving interactions (following 2-step directions)
- 24 Not using words to get needs met
- 36–48 No signs of using logical ideas with caregivers or pretend play with toys
- Note: Serious emotional difficulties in parents or family members at any time warrant full evaluation.