Students constantly notice the world around them, and to help make sense of it all, they attempt to group and categorize objects and experiences they encounter. In science, the study of classification is referred to as taxonomy. To make this subject accessible and engaging for young learners, approach it from an interactive and relevant angle by allowing students to classify objects familiar to them. At the same time, students are encouraged to use many of the actual processes involved in scientific investigation and mathematical problem solving, including observing, measuring, describing, questioning, and communication.