“What’s the sleepiest thing at the Thanksgiving table?”/“Nap-kins.”

A riddle about the Thanksgiving table is:
 
Q: What’s the sleepiest thing at the Thanksgiving table?
A: Nap-kins.
 
The riddle has been cited in print since at least 2006.
 
     
Brownielocks—Thanksgiving Jokes and Riddles, etc. (November 17, 2006)
22. What’s the sleepiest thing at the Thanksgiving table?
NAP-kins
 
Twitter
Big Meech ✊🏿 🇵🇷
‏@VersacePapi
What is the sleepiest thing at a #thanksgiving table??........Nap-Kins…kids be funny a shit lol
4:47 PM - 25 Nov 2010
 
Google Books
The Happy Classroom:
From Ha-Ha to A-Ha
By Janet Aaker Smith
Marion, IL: Pieces of Learning
2011
Pg. 87:
What’s the sleepiest thing at the Thanksgiving table?
Nap-kins.
 
Twitter
Bill Helton
‏@7colonel7
Corny joke…What is the sleepiest thing on THANKSGIVING?  Nap kins!
6:01 PM - 21 Nov 2011
 
Twitter
oasiskzoo
‏@oasiskzoo
What’s the sleepiest thing at the Thanksgiving Table? Nap-kins
10:40 AM - 23 Nov 2011
 
Mom Junction
90 Funny Thanksgiving Day Jokes For Kids
ARSHI ON NOVEMBER 3, 2015
(...)
Joke 76:
Q. What’s the sleepiest thing at Thanksgiving dinner?
A. The nap-kins!
 
Google Books
The Super, Epic, Mega Joke Book for Kids
By Whee Winn
Grand Rapids, MI: Zonderkidz
2016
Pg. ?:
What’s the sleepiest thing at Thanksgiving dinner?
The napkins.