In this chapter, toy testing creatively engages fifth-grade students in engineering design. This toy rocket unit engaged fifth-grade students in an engineering design process that allowed them to integrate engineering, physical science, and mathematics content. This unit taps into students’ creativity in the hopes that they will understand science and engineering as creative endeavors. A materials list, teacher background information, assessments, and outcomes are provided. This book selection includes the Table of Contents, Introduction, References, Internet Resource, and Index.