I just had one of those great ideas, a plan for a device that will (would) be an almighty tool in school&exam cheating. The idea is to use UV lamp and a pen that writes with invisible ink, made of raw potatoes that contain farinaceous. The UV light itself is invisible, and even when the lamp (shaped like the pen) is pointed towards the ink, it's invisible. What's the key? A filter. A thin, plastic filter (that is usually white, like on neon bulbs, but I read it can be transparent) that can be "glued" to glasses. This would allow you to see the ink, without anyone knowing. The only way to reveal the ink (when it dries) is to expose it to 250 degrees (Celsius), but I doubt that teacher would roast your table.

Then my little sister told me "you can buy one of those in China town"… Man, was I pissed off! Why is it, that anything I come up with is already invented by China, Tesla, Darwin, NASA, or Sony ???

That's why I decided to move to Mars. Hopefully they have internet there… If I find any life forms, I can spread my inventions, without worrying about copyright, cause thise lifeforms are probably single-cell organisams.

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Okay, I'm on mars now. I seem to have a good connection here, so it's all good. In case you wondered how do Mars citizens look, I made a pic, with my special space camera.

http://img54.imageshack.us/my.php?image=marsovac9jv.png