httpv://www.youtube.com/watch?v=oITeUEjrY3Q

What kinds of interfaces can you prototype?
Paper prototyping can be used for virtually any type of human-computer interface – software, Web site, hand-held device, or even hardware. Its purpose is to get quick feedback from users while the design is still (literally) “on the drawing board.” Some paper prototypes are hand-drawn, while others use printed-out screen shots.

How is paper prototyping related to usability testing?
The above definition of paper prototyping overlaps with usability testing, but the two concepts are not quite the same. It’s possible to conduct usability tests on real interfaces, not just paper prototypes. And paper prototypes can be used for purposes other than usability testing – some product teams find them helpful in generating design ideas and conducting internal interface reviews.

What skills do you need?
You do not need to be a graphic artist or software engineer to create a paper prototype, though those skills might come in handy when you’re ready to build the real thing. If you have ideas for your interface and can draw them – rough sketches will do – then you can create a paper prototype.