Al Jaffee's Fold-Ins for Mad Magazine, from the 1960s to the present, in interactive form. [Yes, it's the NY Slimes, but it's worth it to go see some of the old Mad Magazine inside-the-back-cover, fold-over-the-picture-so-you-can-see-the-message art. It leans left, but it's a fun trip down nostalgia lane, if you grew up reading Mad.]