3D printing is quite the interesting concept that is set to revolutionize a lot of things. If you're not familiar here is a video that should get you up to speed:
So there's that, and now there is a similar product in PEN form. Sure it must not be easy to use but it's pretty damn cool. While I hate, hate, HATE printers (and the way printing works), but I could totally get down with 3D printing. Although if there are so many problems with paper printing today, imagine how hard it must be to keep a 3D printer up and running. GAH! Still there are tons of possibilities with this technology.
Take a look at the full article about the 3D printing pen here: