papercraft

Make a Pair of Paper Aperture Glasses

Instructables user art.makes has a tutorial on how you can make a pair of paper iris glasses with adjustable apertures. You could definitely build upon the idea to make each side more like a camera lens (e.g. adding barrels, f-stop values) -- perhaps as part of a geeky Halloween costume?

Polaroid Camera Models Made with Paper

Mel Stringer (aka girliepains on Etsy) keeps dreaming up cooler and cooler camera papercraft decorations. Her latest creation is a Polaroid model that include fake Polaroids to stick in the slot.

Print and Build Your Own Highly Detailed Paper Canon Cameras

Last year, Canon celebrated its 50th anniversary in manufacturing SLR cameras and released three super detailed paper craft cameras that you can print out and build yourself. These included the Canonflex, the AE-1, and the EOS 5D Mk II. Unless you have a good amount of time you can set aside for arts and crafts, this probably isn't for you -- each camera has dozens of pages of detailed instructions and a ton of tiny pieces that come together to form the final replica camera.