This is an example of a GREAT homemade Neodymium Magnet Free Energy Generator. As you can see, it is well constructed with a power train built right in. You can actually use that power train to TURN STUFF!
Whatever you want really, turn some wheels, turn some turbines, turn some lights on, or simply just hook an alternator up to that sucker in order to harness that energy and turn it directly into power.
Neodymium Magnets are some of the strongest ones known to man at this time. They can be pretty expensive at times but if you can get your hands on some, then I highly recommend you do because you can do so many things with them.