The world needs a new source of energy, an unspillable source.

Buliding a wind turbine generator?

Can anyone give me the link to a good site with the step by step procedures of making a wind turbine generator. It is for a school science fair so not something with very expensive parts or anything.

Also, I am testing what shaped blades generate the most electricity. Is that a good idea or should i go with something like what material or what shape?