After getting a rough idea of what the charging pad needed in order to work, we went straight to cutting and gluing and building physical prototypes out of cardboard and paper. Sean, our product designer, and Elise, our college intern at the time, teamed up to create and model a number of prototypes. Pretty quickly, we settled on a circular shape—it felt totally natural as a target to aim for when placing your phone down. Squares and rectangles were problematic, because the visual lines get jumbled if the phone isn’t placed in the correct orientation. It can easily feel crooked, whereas with a circle, it will never feel that way. So, a circle it was!