Ken Pickar's class, "Product Design for the Developing World," challenges Caltech students to solve some basic problems of the world's poor. The catch: in ten weeks, they must turn rough concepts into workable designs, including financial and market assessments. On December 7, this year's students presented their results. Their visual aids included a typically Caltech-like hodgepodge of pipes, motors, and fans—but as Pickar reminded the audience, "Prototypes aren't supposed to be elegant. They're supposed to be crude and quick."