Wind generator project designs

We were having a hard time with the wind generator project; we couldn't decide upon the design. However, as we kept trying, we learnt that we don't need too many magnets. It only makes the invention heavier and it's a waste of magnets. In addition, I learn that we need something to move the magnet pretty fast. For example, when we used a small wheel from a torch, it moved the magnet quite fast and we generated about 5 volts of electricity.