LOL. DD3 still doesn't "get" jokes. She loves them, and makes them up, but the ones she makes up don't make any sense, so I'm pretty sure she just likes the concept of saying something that makes people laugh. Super cute that your kid is already making up his own jokes. smile

Oh, and DD has a book of knock-knock jokes that MIL sent her, and it is FULL of jokes like the ones you list. So you might look around for a simple joke book.