“What’s a tuba for?” (joke)

“What’s a tuba for?” is a classic tuba joke. “What’s a tuba for? To blow into, or to make a house outa?” was cited in print in 1940.
 
   
Wikipedia: 2X4
2x4, two-by-four, or two by four may refer to:
 
. Two-by-four, a common size of dimensional lumber named for its unprocessed dimensions, usually measuring 1½ × 3½ inches in practice.
     
9 March 1940, Ogden (UT) Standard-Examiner, “Sol’s Sunshine and Shadow,” pg. 8, col. 8:
What’s a tuba for? To blow into, or to make a house outa?
 
Google Groups: rec.humor
Canonical List Of Music Humor (part 1/1)
Her Jangle Is Wide Angle
10/14/93
(...)
What’s a tuba for?
1 1/2 X 3 1/2.
 
Google Groups: rec.music.classical
Musician jokes v2.0
boB
9/1/94
(...)
Q: What’s a tuba for?  A: 1 1/2” X 3 1/2”
 
Google Groups: rec.humor
Needed: Tuba Jokes!
John Clifford
12/3/94
A favorite that I heard every day for a summer while working at disneyland is:

Q: What’s a tuba for?
A: Oh about this by this (tuba player holding fingers two by four inches apart.
 
A Prairie Home Companion - Jokes 1999
April 8, 1999
Q: What’s a tuba for?
A: 1 1/2” X 3 1/2”.
Rich Pawlish, Pleasanty Unity, PA
 
Facebook
Canadian Musician Magazine
Joke of the Day
Q - What’s a tuba for?
A - 1 1/2 X 3 1/2.
July 31, 2014
 
Twitter
Eldge
‏@Sickayduh
[Home Depot]
*nervously in front of the other dads*
“Ha.. ha.. no.. uh my son asked what’s a tuba for.”
9:22 PM - 17 Nov 2014