This case study provides a summary of the invention of Silly Putty, along with recipes for students to make toy putty. In this lesson, students explore the unintended discovery of silly putty, as well as non-Newtonian fluids. Students consider how silly putty was discovered and work together to think about new applications for toy putty to solve real-life problems. This case can be used as a way to integrate engineering into a discussion of states of matter or into a lesson on atomic structure or chemistry. A materials list, teacher notes, teacher background information, safety notes, standards, assessment, resources, and references are provided. This book selection also includes the Table of Contents, About the Authors, Acknowledgments, Introduction, Appendix, Image Credits, and Index.