Ok, this is going to sound utterly silly because I don't understand electricity and therefore can't explain too well what I'd like to know. Bear with me, please. On one of those websites that show olden stuff, I saw a setup to get water out of a well. Basically, it looks like a big wooden hamster exercise wheel, but it's set up for a dog to walk in it to turn the wheel to bring the water up. Now, this is a mechanical sort of thing, right? But technically, it's the same as a water wheel or a windmill, and can't you produce electricity with a windmill? If so, could you produce electricity with a doggie exercise wheel? And if so, what's needed to create the electricity, to store it, and to use it for something minor like, say, outside lighting or possibly a short electric fence? I suppose it would be about the same basic idea like the guy sitting on a stationary bike and pedaling to power a lightbulb - but I don't understand that either Any input, anybody?