I'll never tire of the play on words.

"Mom- for April Fool's day I have a funny joke I'm going to play on my teacher."

"What's that?"

"Well- I'm going to take a cereal box to school but it won't be empty- it will be full! Then I'll give it to her and say "April Fool's"!! Won't that be funny?"

"Huh? That sounds cute but what do you mean? I don't understand the joke"

"MOM, The cereal box will be FULL- get it "April Full's" because it will be April Full's Day."

"Ooooh I see now. Yep. That's the funniest thing I've ever heard of. You are pretty clever."

Nope sure didn't correct her. You can bet I'll be sending her with a full box of cereal on April "Full's" day too. I'm not hoarding this one to myself. ;)