Fun theory class 4 brief presentation.
Some very informal thoughts: Should we change the idea to a soap button-triggered pin ball machine? It would have to be a ball/drop system that would only work if the person was vigorously washing their hands(?). Motion- tracking the hands would involve a camera in the bathroom, though. Too complicated in physical-computing terms, in this timeframe. Maybe it should be a Processing sketch of the randomly-set ball movements, and the mirror would not show until the sketch was over and the person was done vigorously washing their hands…(?) Motion-tracking would still have to be involved, though, to ensure that people were washing their hands for long enough and vigorously enough.