What is this thing for anyway?

It seems that little Brenna has discovered her tongue. All day long that tongue has been in and out and in and out. She smiles intermittently as she plays with her tongue. Ken and I have been cracking up all afternoon. Ahhh the joys of discovering what you can do. It's been a joy for us to watch her figure it out. And the slobber that comes with her little pleasure is for another post. :)