“Why shouldn’t you tell an Easter egg a joke?”/“It might crack up.”

An Easter egg riddle is:
   
Q: Why shouldn’t you tell an Easter egg a joke?
A: It might crack up!
 
“Why shouldn’t you tell a joke to a raw egg?”/“Because it might crack up!” was cited in print in 1998. “why shouldn’t you tell an Easter egg a joke? because it might crack up” was posted on the newsgroup talk.religion.course-miracle on March 31, 2004.
 
         
June 1998, Children’s Digest (Indianapolis, IN), “Jokes & riddles,” pg. 17:
Question: Why shouldn’t you tell a joke to a raw egg?
Answer: Because it might crack up!
Nathan Dunlap
San Jose, California
 
Google Groups: talk.religion.course-miracle
Why did the Easter bunny cross the road???
Yashah
3/31/04
(...)
why shouldn’t you tell an Easter egg a joke?
because it might crack up.
 
27 March 2005, The Sunday Mail (Brisbane, Queensland), “Easter jokes,” Sunday Mail Magazine, pg. 106:
Why shouldn’t you tell an Easter egg a good joke?
It might crack up!
 
14 April 2006, Lincoln (NE) Journal Star, “Kids Corner,” pg. 3:
Q: Why shouldn’t you tell an Easter egg a joke?
A: It might crack up.
 
Google Books
The Whopping Great Big Bonkers Joke Book
By Puffin Books
London, UK: Penguin Books
2007
Pg. ?:
Why shouldn’t you tell an Easter egg a joke?
It might crack up.
 
Twitter
James Redshaw‏
@Itsjimbosaki
Why shouldn’t you tell an Easter egg a joke?
It might crack up!
8:23 PM - 18 Mar 2009
 
Google Books
The Super, Epic, Mega Joke Book for Kids
By Whee Winn
Grand Rapids, MI: Zonderkidz
2016
Pg. ?:
Why shouldn’t you tell an egg a joke?
It might crack up.