The Apple Doesn't Fall Far From the Funny Tree

My handsome son's first joke:

What did the slow tomato say?
KETCHUP!

I'm not sure where he heard it. I bet it was on pbskids.org or nickjr.com. I didn't know what was coming when he first hit me with it and I think I may have scared him with how hard I laughed. My boy has great delivery, some lucky lady is going to miss a lot of sleep laughing at him.