This class activity allows students to quickly “do” a class science fair project in order to see how it’s done. It's also a great way to introduce concepts of controlling variables and testing multiple subjects using an inexpensive breath mint. Even if you do not do science fair projects with your class, this is a terrific activity for the beginning of the year as an introduction to the process of scientific inquiry. Students discover how to ask a simple question and collect data to answer it in a step-by-step fashion.