We all hope our classrooms don't take on a circus-like atmosphere, but juggling can be an engaging way to introduce elementary physics to students. The very act of tossing and catching objects can help students to understand the basic physical principles involved in rotating a set of objects. This article suggests a variety of simple hands-on activities and demonstrations for introducing physical science concepts associated with juggling. In addition, students will learn the value of making predictions based on careful observations and repetitive findings--an essential characteristic of the scientific process. (Contains 4 figures and 2 online resources.)