Babies often laugh when they:
- Play games like peekaboo or tickling.
- See funny facial expressions or hear silly sounds.
- Enjoy bouncing, being gently lifted, or playful movement.
- Interact with pets or siblings doing something amusing.
- Feel safe, comfortable, and happy with their caregivers.
Most babies begin smiling socially around 2 months of age and often start laughing between 3 and 4 months, though every child develops at their own pace.