This Book is a Camera - This pop-up book is a camera!

From the site: This pop-up book is an extremely minimal, but functional, large format camera. It concisely explains—and actively demonstrates—how a structure as humble as a folded piece of paper can tap into the intrinsic properties of light to produce a photograph. The book includes: - a piece of paper folded into a working 4x5" camera - a lightproof bag - 5 sheets of photo-paper "film" - development instructions (from complete DIY to "outsource it") - a fancy foil-stamped cover that will look good on your shelf - a satisfying demonstration of the connection between design & science / structures & functions