The Wired Optical Ring Mouse looks like it would be impossibly frustrating to use at first, but after thinking about it for a few seconds, it just might be ingenious.

Just slip it over your finger, move the tiny trackball with your thumb and watch as you navigate your way around the page like a professional. I think it’s supposed to slip on your ring finger, hence the name. That way, it should be easy to manipulate the buttons with your thumb as well. It only costs £14.99.