Gibsons theory on Affordance

We have a somewhat new baby boy in our family who is now two months old. For the last three weeks , every time I bring him home I will play with him and say "I lalalalalove you". He is fascinated with the la part of the phrase. My sister has raised seven kids, and multiple grandkids and she stresses the influence of saying this when they are first learning to talk or try to make sounds. He first laughed as a response to me saying this, but for the last two weeks he has been sticking his tongue out attempting to mimic me. I did this with both of my children and it does appear to greatly influence and capture their attention. I believe  the main emphasis in doing this is on visual perception as he is very intrigued by watching my tongue. I believe this would qualify as an affordance.

The attached clip would have to involve environmental affordances along with perception.
http://www.youtube.com/watch?feature=player_detailpage&v=XnvDC6HiaBk