Just curious... what types of toys does your baby seem to like? And what songs/games do you play with your baby?
We got out some rattles this weekend and Selah will smile at them and follow them with her eyes if we hold and shake them for her. Also, I got out a little mirror thing that will hang in her crib, eventually, and have been sitting it on the floor during tummy time/back time. She will just stare into it and then smile now and then at herself.
I love to sing Row, Row, Row your boat with her and "row" her legs. I sing lots of other songs with the big kids throughout the day... so she inadvertently gets them as well because she is always around us.
Has anyone started reading books to their little one?