My family ended up with a pair of gerbils recently. We’ve made quite an elaborate cage for them, and they seem to really like it.

I was sitting here in my chair tonite contemplating going to bed and one of the gerbils started running like crazy in it’s wheel. At first I was like, “Man, you’re loud!” Then I had a neat idea. What if you were to put a generator on that wheel?
As it turns out, I’m not the first one to think of this. I googled “hamster wheel generator” and this was the first link that caught my eye. I might just have to build one of these someday! 🙂