There’s an exhibition going on now at the National Museum of American History in Washington, DC, entitled Paper Engineering: Fold, Pull, Pop & Turn. Although it’s quite small and rather poorly lit, it is worth a visit. They have a couple of books from the 16th century, one, Euclid’s Elements of geometrie with pop-ups of various solids. Perhaps the best feature of the show however is a video describing the creation process, which you can see by clicking here. (As with all YouTube videos, you can make the picture full screen by clicking the button at the bottom right hand corner; the one with the four arrows pointing outwards.)