The guiding question for this activity is,“How can you design a catapult that will launch a marshmallow?” Students are given materials needed to make a catapult and they will try over and over again to launch a marshmallow. An explanation of the science behind the activity is provided. Students will also learn about force, potential energy, kinetic energy, and prototype. Before beginning this activity, we recommend you read Chapters 9 and 10 which are in this book selection. Chapter 9 is an overview of the section and introduces the format used to present ideas for Family Science Night activities. Chapter 10 explains that these activities are what they call novice level. A materials list, references, safety notes, standards, and teacher background information are provided. This book selection also includes the Table of Contents, Preface, Acknowledgments, About the Authors, Introduction, and Index.