The Joke Phase

Have your kids gone through the joke phase? Are they in it right now? I feel your pain if they are. I don't remember it being this bad with the girls, but the boys ARE KILLING ME with their endless, not-funny jokes. :) They are now making them up, which is even worse. Here's Nathaniel's latest joke this evening:
Nathaniel: "Where is peanut butter and jelly's home?"
Me: "I don't know. Where?"
Nathaniel: "In BREAD!" And he and Jackson laugh hysterically. And I'm expected to laugh hysterically.

Yeah.

Somebody please send them an actual joke book, pronto.