One of the best things about any entry level physics course is building a pinhole camera. It usually involves simple materials, but it's still a challenging exercise, and an educational one at that — your basic pinhole camera can provide an excellent introduction to the concepts surrounding light and optics.
In short: pinhole cameras are kind of the bee's knees, which is what makes this project by Lomography Magazine's Francesco Capponi so very, very cool. See, the Lomography community is all about analog photography — that means they're into historic, traditional photography practices that also happen to lend themselves well to hack-tastic, DIY projects like pinhole cameras. But Capponi wanted to take things a step further:
Since I started pin-holing the world, I have had the strong desire to make a special camera, with the purpose of shooting just one photograph. The purpose was to sacrifice the camera in the process of photo creation – I wanted the camera to become the photograph. To let you understand, the process from the camera to the photograph is the same that ties the baby bird to the egg: the bird grows protected from the shell and when it's ready breaks it and comes out. This is why I decided to create the Pinhegg – An Egg Pinhole Camera.
Using an egg, some liquid photographic emulsion, photographic acid, tape, and a few other materials, Capponi did exactly that. Best of all: he's written up an instructional on the entire assembly process. Click through the link below for the full walkthrough.