This project site is for a physics demonstration and lesson on power generation and a brief introduction on induction. This wind generator can generate between 3-5 volts (enough to easily light up a few LEDs) with just your breath. 

Here you will find links to:
2) The lesson plan, and 
3) The worksheet that I created

The rotor of the turbine has high powered magnets underneath which, when spun rapidly over the coils of wire (the stator), create an alternating induced emf or voltage.