Mad magazine fold-in interactive

Mad magazine is famous for many things, but its fold-ins - those sheets that required some just-so folding, to reveal another image, and often a message - rank up there. The New York Times has a great interactive on some of the fold-ins that Al Jaffee has done over more than four decades. The one above is from 1968, when the Vietnam War was no laughing matter. Thanks to Kevin for the pointer.