I'm sure that you've all heard ways to make your own pinhole camera out of a Quaker canister or something similar. Well, in 1979 Czech inventors Martin Pilny, Mirek Kolar, and Richard Vyskovsky created a "functional pinhole camera made of stiff paper, designed for 35 mm film, which resembles a real camera" and published it in the magazine ABC mladych techniku a prirodovedcu (An ABC of Young Technicians and Natural Scientists). Courtesy of pinhole.cz, you can download an Adobe PDF file and make your own Dirkon pinhole camera. This sounds pretty cool...