At 4 to 6 months, babies gain more mobility and social awareness:
- Physical milestones: Rolling over, sitting with support, and grasping objects to bring to their mouths.
- Cognitive milestones: Exploring cause-and-effect relationships by shaking or banging toys.
- Social milestones: Laughter and more interactive play as babies respond to familiar faces and sounds.
This is an exciting period where babies become more active and engaged with their environment.