Fooling Around

How do you explain our strange customs to children from another country?  Here's the wiki version of April Fool's Day.

Every day I have the children write a journal entry.   On April 1st, Habtamu's and my conversation went like this:

H: Hey Mom?  Is it April 1st?

Me: (thinking quickly for so early in the morning)  Nope.  (Said with totally straight face.)

H: So.... what is it, then?  March 32nd?!

Me: Yep.

H: (sighs)  Man, this is the longest month!

I let him in on the joke soon, and he tried it on his sister, who TOTALLY didn't understand what was going on.  Once she got it, she was on board. 

This is the kind of day MADE for the girl whose standard daily joke is this:

Guess what?
What?
Chicken butt!

Guess who?
Who?
Chicken poo!

Guess why?
Why?
Chicken pie!

Or this:

(Feel a tap on the back.)
(Turn around, only Y is there.)
It wasn't me!