Stick out your tongue

This normally, ready to smile for pictures boy was way too involved in something bigger today...his tongue. Any other parents or aunts, uncles, grandparents, cousins, etc.experience this with your babies around 6 months? Very cute and as a result I have been calling him Charlie Brown for the day.Update: I found out that he is teething. He's been doing all the other stuff, but I didn't know the tongue was part of the deal. :)