What does a pinhole camera do and what is it for mostly:S?

A pinhole camera does just what any other camera does. It records light coming in onto a film plane. Instead of a lens though, it uses a tiny hole, small enough to focus the light. Exposure time is long, so it's not for action shots. It's best for things like still life and landscapes. You can probably find instructions on the internet for making one. There are several ways to do it.