A STEM activity is any activity that integrates the use of science, technology, engineering, and mathematics to solve a problem. This chapter presents a STEM unit that was completed over two weeks in a kindergarten classroom. The unit focused on the problem of building a trap to catch a mischievous gingerbread man. During this unit, students started to become aware that even though science, technology, engineering, and math are different, they are intricately related in the problem-solving process. A materials list, teacher background information, and outcomes are provided. This book selection includes the Table of Contents, Introduction, References, Internet Resources, Trade Books, and Index.