facadeprinter!

This is what you get when you combine a paint ball gun and architecture!
This machine works with build in software and seems relatively easy to work. It shoots about 5 dots/balls per second from a max distance of about 12meters. I think its great and i would love to use it to decorate your house, at night, while you sleep ;-)

http://www.an-architecture.com/2010/04/facadeprinters.html