it's a MAD world

The first issue of MAD magazine

I've been a big fan of mad magazine since i was a kid. When I was younger I might not have understood the jokes as much as I do now, but man they had some great artists.
One of the best things about buying mad was the fold-in on the back and while the Q & A might have flown over my head I never could work out how Al Jaffee got those things to work!
Another favourite of mine was the very noir Spy Vs. Spy by Antonio Prohías, it's great example of negative space and simple clean linework.

NY Times have (awesomely) put together an interactive MAD fold-in website!