An Egg

Working with a challenging material can be a source of great frustration, but if you manage to make something amazing, it makes the accomplishment that much more satisfying. The tedious process of turning an egg shell into a camera sounds daunting from the start, but with a little dedication and a rotary tool, it's possible. One of the cool things about the Pin Egg project is that the shell isn't just the camera, it's also the film. The chemicals were applied directly to the inside of the shell where the final image actually resides. It's a tricky process, but the results are awesome. And if you screw it up, at least you have 11 more chances in the box of eggs.{C}
A Human Skull

Adding a camera to your eye is one thing, but using an old human skull to take pictures is a whole different level. Wayne Martin Belger is responsible for making some truly incredible one-off cameras that are works of art in and of themselves. His piece entitled "Third Eye" is made from a 150-year-old human skull with elements made from aluminum, titanium and gemstones. It exposes 4x5-inch negatives inside the skull through a hole in the forehead. You can see the resulting images at the artist's site and they're every bit as creepy as you'd expect them to be.
Legos

You can make pretty much anything out of Legos. In fact, if you look in the internet, you'll find that someone somewhere has made, well, pretty much everything out of Legos already. But, the Lego camera had so much hype that it became something of a real product. For $40, you can get a working digital camera made from colorful plastic bricks. Of course, there is a whole heap of other examples of Lego cameras online, but it only seems right that you'd make your own.