Neat interactive page at the New York Times. I grew up enjoying Mad Magazine like a lot of other Gen X-ers and Gen Y-ers. One of the treats in Mad Magazine were the fold-in sections.
Some ingenious programmer found a way to make the fold-in page work on line. Click the image to launch the site then click start to begin.
Source:
Fold-Ins, Past and Present
Neil Genzlinger, Tom Jackson and Sylvia Rupani-Smith, The New York Times