Design & Documentation » Paper prototypes
Paper prototypes can be anything from a series of sketches shown to describe a process, to a series of more formal wireframes, normally presented for user testing
The user follows a journey, 'clicking' with their finger, and interactivity is shown with modified paper widgets, relying on post-it notes and folded paper to convey interaction
Examples
Some examples from paper prototype, to wireframe, to finished design:

