Rock hound

I often find Konrad with rocks in his mouth. He'll find a rock and roll it around in his mouth. The tell-tale sign is when he looks at me and doesn't smile with an open mouth...I know he's hiding something. (Sucking on rocks is not a habit I approve, in case you were wondering).

Here he is after I took the lava rock out of his mouth, and he's put it back to his mouth and I say, "Not in the mouth, Konrad." He puts it back to his mouth and looks at me, knowing he can't get away with it while I'm watching. Time to move the boy!