Talking your baby through any mirror activities you're doing together can also help their early language skills. Why not pull different faces and talk about all of the emotions you're showing?
Certain activities, toys, books, and baby games do a better job than others ... like this awesome foldout book complete with a mirror, are the perfect first tummy-time playthings for babies.
At this point, they come to understand that the reflection in the mirror is them and not another child to play with! Watch the video below to find out more about baby mirror recognition.