Or when his friend Libby comes over, let her push him around. He sits on the truck and she pushes the back all through the room. But Nolan doesn't get up. He just sits on the truck and play with toys, just sort of claiming this truck is HIS.
So when Libby got impatient with Nolan's lack of sharing she improvised. While I was very concerned about his reaction I did not imagine this one... laughter. He thought this was very funny. I think he tried to shove her off but she did not give in. Then he noticed her hair which he enjoys playing with - perhaps with envy.