Hamster Power!
Here’s an article about a teen who made a hamster powered phone charger! Here’s another link to a video that shows how to make a rodent powered night light.
If you don’t like the idea of exploiting the good will of our furry rodent friends then maybe this will suit your fancy. A hamster toy that your cat will love watching! Ever worry about the futility of it all - the hamster wheel of modern living? 
Here is a great way to show your angst! A USB powered hamster wheel that is connected to your keyboard - the faster you type the faster the hamster runs the wheel… An expensive chuckle at 45 bucks but check it out.
