Story of deception... Video of Car Noises

Here's the scenario:
Mommy sees James with his hand in a tight grip.
M: James, what's in your hand?
James looks at Mommy and runs into another room.
D: James, come here.
James goes to Daddy.
D: What do you have in your hand, James?
James hides his hands behind his back and starts to move away from Daddy. Daddy opens James' hand to find a little piece of a leaf. We look at each other and decide he can eat it if he really wants and give it back to him.
J: Ooohhhh
James smiles and runs to the other room. He stashes it in his mouth, looks at us, and smiles again.

Here's a video of James' version of a car's motor. It sounds a little peculiar. We finally discovered he must have mimicked it from a toy car he has that makes a similar sound when you push a button.