Mommies, what can you do or are able to do in our age from movements? …

Mommies, what can you do or are able to do in our age from movements? We're flipping onto our stomachs while holding hands with our right side. We hold on tight to the rattles. But we don't like lying on our stomach. We smile back. We laugh out loud but rarely. We express emotions. We giggle. We chat. We keep our heads well-held. But not for long. Write to me, I'm interested) P.S What else besides the pediatrician should I go to see at 4 months old?