Principles of a homemade generator (SCIENCE PROJECT?)

                 I think the proper way to explain this one is to sprinkle some Material ideas, and construction ideas in with the explanation of how it works.So that you won't be constricted by one way to do it.

                  In a simple generator you have a coil of wire and a magnet with defind north and south poles (such as a rectangle magnet). If you rotate the magnet close to the coil(s) a small electrical current will be produced from the leads coming off the coil(s).

There are no confines when it comes to how to build a usable generator. You can take a 20 oz bottle with a magent inside that has an axle through the center and coil the wire around the bottle and rotate the magnet.My intent is to not give directions on contruction but only principle.There are more complex or more basic ways to construct one so play around with it and post them in the comments.