Your idea will have lots of testable components, so be clear about what you need to learn and which components will give you the necessary answers. Prototyping isn’t about being precious. Make simple, scrappy prototypes to not only save time, but to focus testing on just the critical elements. You might be trying to learn something like, “How big should this be?” or “What should the uniforms of the social enterprise look like?” At this stage you should have a lot of questions about how your idea should work. This is a great way to begin answering them.