Me to a 3 year old boy, "Will you close that door behind you please?"
The little guy looks at me, turns around, looks at the door and takes off running the short 3 feet between him and the door. He leans into it and SLAM! ...the door is shut.
He turns and looks at me with his chin slightly down and the most proud look on his face, a "yeah, that's right" smile, eyes twinkling and all and confidently tell me, "I'm strong, hu!"