“What did the green grape say to the purple grape?”/“Breathe!”

A popular children’s joke about grapes is:
   
Q: What did the green grape say to the purple grape?
A: Breathe!
 
The joke has been cited in print since at least 2007.
 
 
28 November 2007, Wisconsin State Journal (Madison, WI), pg. D1, col. 1:
Dopey joke o’ the day
Q: What did the green grape say to the purple grape?
A: Breathe!
 
Google Books
Mr. Potato Head Upside Down Joke World
By Steve Charney
New York, NY: Sterling Publishing Company, Inc.
2008
Pg. 10:
There was a green grape and a purple grape in a kitchen. The green grape turned to the purple grape and said, “Breathe!”
     
Buzzle
Hilarious Text Messages
Kashmira Lad
November 27, 2008
(...)
Q: What did the green grape say to the purple grape?
A: “Breathe, stupid!”
 
Twitter
Julia Frey
‏@Kulia
@davidmarkland What did the green grape say to the purple grape? “Breathe!!”
6:49 PM - 19 Jan 2009
 
Twitter
Ali
‏@Charlys_Mom
what did the green grape say to the purple grape???.......breathe man!
1:32 PM - 19 Feb 2009
 
Twitter
Rachel Belsak
‏@Pawns43
@PushPlayDEREK what did the green grape say to the purple grape? Breathe you idiot Breathe!!!!
4:35 PM - 24 Mar 2009
 
Google Books
Preparing Children for Success in School and Life:
20 Ways to Increase Your Child’s Brain Power
By Marcia L. Tate
Thousand Oaks, CA: Corwin
2011
Pg. 103:
What did the green grape say to the purple grape?
Breathe! Breathe!
 
Google Books
The Mammoth Book of One-Liners
By Geoff Tibballs
London: Constable & Robinson Ltd
2012
Pg. ?:
What did the green grape say to the purple grape?
“Breathe! Breathe!”
   
Google Groups: Campion School Class of ‘74
Grapes are sour?
Munaf
8/29/12
Q: What did the green grape say to the purple grape?
A: “BREATHE YOU IDIOT, BREATHE!”
 
Google Groups: East Nashville
Jokes for the Day
kay
11/13/14
What did the green grape say to the purple grape?
Answer: Breathe