Knick Knack Paddywhack!
was printed and assembled in China.
It was composed of more than 200 separate pieces of paper,
punched out from three large, printed sheets.
The mechanisms were designed
by paper engineer Andrew Baron
in collaboration with Paul.
Knick-Knack Paddywhack!'s mechanics are in all likelihood the most intricate ever created in a movable book, surpassing even those of the legendary Lothar Meggendorfer (1847-1925).

Andy came to paper engineering from a background as a tinkerer and repairer of antique record players, radios, automobiles and other mechanical and electrical devices. He is based in Santa Fe, New Mexico.

Paul Zelinsky's collaboration with Andy was trans-continental-- a monumental effort, involving many hundreds of hours of telephone calls, a similar number of e-mails, and a considerable amount of overnight shipping. The collaborators started and finished their work on Knick-Knack Paddywhack! without once meeting face-to-face.

However, both continued their involvement in the project to the point of overseeing its printing and assembly. It was in the city of Shenzhen, China, where the two met for the first time.