http-//madgyver.roboterbastler.de/index.php?en_reverse How cool is that? This laser pen built from a DVD Laser Diode can be used to write into black plastic! You cant do that with an expensive green Laser! Even if you can, mine costs 4€... How about you? =) EDIT- Okay, seems like you can do it with a green Laser, but still they are way more exspensive then what I have here. I like to buy results, not prestige.