at the start the wheel goes nowhere until the hamster starts running. When another hamster gets on it stops again until they both start running. I suppose it could be powered by Illuminati lizards - they're hamsters' natural enemies.
Why cruel? No one forced them to climb on there and I bet they repeatedly do it. Not that different from a Hamster 'over spinning' on a traditional wheel.
I have seen hamsters going into whirling things like that of their own accord and, if thrown off, gone back time after time. It seems a bit rough for a little hamster but maybe they like whirling around.
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