psychology
Baby / Milestones
Cognitive
Object permanence, cause & effect, imagination
Cognitive milestones reflect how your child learns to think, understand, and solve problems.
6–9 months
Object Permanence
Your baby understands that objects still exist even when hidden. Peekaboo becomes especially fun.
6–12 months
Cause and Effect
Your baby learns 'if I do this, something happens' — dropping toys, pressing buttons, shaking rattles.
1–3 years
Problem Solving
Your child begins figuring out how to open containers, reach desired objects, and solve simple challenges.
2–4 years
Imaginative Thinking
Pretend play becomes increasingly complex and creative.