With half a day ahead of us and the Preliminary Design Review on our minds, we set to work. Designing proof-of-concepts, we continued to rebuild each prototype until they were deemed effective. Using materials such as pipe cleaners, LEGOs, cardboard, plastic pots, and a vacuum, innovative prototypes emerged.

After a yummy dinner provided by our family, we gathered at 7:15 to begin our PDR. Each group presented their ideas to teammates and mentors. Following each presentation, groups were asked questions to clarify their design. We thought about the designs presented to prepare to vote the next day.