It looks like he's trying to say something out the side of his mouth. He looks a little sly, I think. This is from my bf's guitar case, so maybe he's trying to sing?
No one ever told him that it's impolite to stick out your tongue. I'm not going to be the one to say it. No way. He's attached to the light that helps keep our tortoise alive, so I don't want to do anything to upset him.