In this chapter, students wonder how burning a log in a campfire compares to eating a marshmallow. This problem focuses on combustion and metabolism of marshmallows. Marshmallows are a food that is mostly sugar and that students may have experience burning. Alternative contexts include burning wood, oil, a cracker, or a nut. In this problem, the challenge to students is to determine what happens to the matter and energy in a marshmallow when you eat it? In what ways are these matter and energy changes similar to and different from burning the marshmallow? A materials list, teacher background information, safety practices, references, assessment, and outcomes are provided. This book selection includes the Table of Contents, Preface, Catalog of Problems, Acknowledgments, About the Authors, References, and Index.