Go to an abandoned home (we have lots of them in the US), rip out a roll of copper wire and take the refrigerator magnets on the frig while you are at it and spin the magnets inside the wire coil.
Yeah... You could invest in them... but it might be wiser to invest in the tooth fairy. I hear its quite a racket, with all the candy and soda the kids are eating nowadays.
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Don't believe everything you read on the Internet!
Electricity is almost always generated by spinning magnets within wire armatures, so basically the electricity produced IS free . (Sarcasm) What they don't tell you is that SOMETHING has to spin the magnet ; it won't spin by itself . It is that something needed to turn the magnet that will consume energy that costs money .
Bottomline is that it's a load of CRAP!!!!
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If only you knew the power of the Dark Side of the Force