Not tired?

Kellen didn't get all of his nap out today...he slept from Conroe to CS, but wouldn't really go back to sleep again...so, just a little bit ago I asked him if he was sleepy and he responded, "Yes, just a little bit. I want to keep it safe in my mouth." Utterly confused, I asked him to repeat what he had said. "My YAWN...I want to keep my YAWN in my mouth." Then he let it slip and yawned, looked at me and said, "Well, there goes my yawn...I guess I'm not sleepy anymore."