Pinhole Photography

A pinhole camera, also known as camera obscura, is a camera with an aperture made from a pinhole and does not have a lens. It is a simple optical imaging device that embodies a dark box of sorts with one side having a small hole (literally a pinhole!). This box creates an image of the outside space on the opposite side of the box.

Some great websites that I came across that offer great instructions/ideas on how to make your own pinhole camera include:

23 Pinhole cameras that you can build at home
How to build your own matchbox pinhole camera
How to make a Pinhole camera

Saving the best for last, I think the following link has a very unique idea:
Awesome Pinhole camera that has 25 pinholes!!

An example from this website is: