To shine light on the simplicity of creating a pinhole image, artist Kelli Anderson designed This Book is a Camera, a pop-up book that contains a real, useable pinhole camera inside.
The book aims to explain how cameras work in the most basic way, and shows how easy creating a camera obscura really is. The book includes a pinhole camera, a starter-pack of B&W Ilford photo paper, and instructions for shooting. All you need is developer fluid and a dark room to print your images, and you are ready to go.
You can buy the book here for $29.