I try to write about real issues of use and usability on this blog, but sometimes things that are just clever catch my eye. Not particularly useful, or usable - but things that'll put a smile on your face. Designer Alexander Hulme has a few of these, including the "Breakable" plate concept and pencil-with-clip shown here. Check out his site for some more. I'm not sure I could recommend any for real life use, but they're good to get the brain juices flowing!