Don’t throw away that aluminum can! Don’t even place it in the recycling bin. Instead, use it in your next science lab. In addition to the economic advantages of using materials such as aluminum cans, there are also pedagogical advantages: Physical phenomena demonstrated with simple, familiar objects may have a more lasting effect than demonstrations using more sophisticated apparatus (Kruglak 1992). This article describes how aluminum cans may be used to determine the amount of calories in a peanut and how to make an electroscope through the process of scientific inquiry.