"Where did the kittens go on their class…

A “museum” has been called a “mewseum” since at least 1890 (if it has anything to do with cats). A riddle has been cited in print since at least 1992:

Q: Where did the kittens go on their class trip?
A: A mewseum.

12 September 1890, Livingston (AL) Journal, pg. 7, col. 5:
A CAT show ought to be held in a mewseum.

Chronicling America
22 September 1890, Santa Fe (NM) Daily New Mexican, pg. 3, col. 4:
The next natural cat show should be held at the mew-seum.

8 November 1895, Arkansas City (KS) Daily Traveler, pg. 4, col. 1:
A CITIZEN of Topeka is a collector of cats and has the largest “mewseum” in the United States.

Google Books
102 Cat and Dog Jokes
By Michael Pellowski
Mahwah, NJ: Watermill Press
1992
Pg. 66:
Where did the kittens go on their class trip?
A mewseum.

Google Groups: soc.culture.malaysia
E-mail penpals request!! ......Dear Lily,
BohTeeNang
5/27/98
(...)
Q. Where did the kittens go on their class trip?
A. To a mewseum.

24 January 2000, Los Angeles (CA) Times, “The Kids’ Reading Room; Jokes & Riddles,” pg. E8, col. 5:
Where do kittens go on a field trip? To a mewseum. (Beatriz, 10, Lewis Elementary, Downey)

Google Groups: alt.humor.puns
Puns of the Weak 03/08/02
Stan Kegel
3/8/02
(...)
Where did the kittens go on their class trip?
To a mewseum (Marsha Coleman)

Twitter
Hethir Rodriguez‏
@hethir
Q: Where did the kittens go on their class trip? - A: To a mewseum:)
11:59 PM - 29 Dec 2008

Google Books
Funny Jokes and Riddles for Children
By Alexandra Cooper
Lulu Press (Lulu.com)
2016
Pg. ?:
Where did the school kittens go for their field trip?
To the mewseum.

Twitter
Pet Insurance Aus‏
@PetInsuranceAus
Where did the school kittens go for their field trip?
To the mewseum. #CatJokes
1:00 AM - 8 Dec 2017

Twitter
Lucky Score‏
@LuckyScoreNet
Q: Where did the kittens go on their class
trip? - A: To a mewseum.
#Joke from #CatJokes in #Jokes, #Humor and #Satire
5:43 PM - 21 Jan 2018

“Where did the kittens go on their class trip?”/“To a mewseum.”