Once you Determine What to Prototype, the time has come to get out there and start testing. You identified what you needed to learn about your concepts during that activity, and these questions should be your kick-off point now. Remember that prototypes are meant only to convey an idea not be perfect. Think small, scrappy, and inexpensive. The aim is to get feedback from the people you’re designing for in a quick and rapid way, quickly move through a variety of iterations, and build on what you learn.