We hope this book will give you a reasonable, first overview of current research on the 3D printing of objects and how it can be used to teach science beyond a traditional context (i.e., beyond pictorial representations along planar blackboards, visualizations in paper or even within modern digital presentations). We aim to inspire curiosity and deeper understanding in young scholars and new generations of scientists to motivate them to start building up their own 3D printing experiences and to explore the huge potential this affordable technology provides. We invite you all to create prototypes and refine 3D physical products and to share them. This could surely add a welcome boost in motivating you to see the connection between abstract physics and mathematics and real world applications. This book also aims to enhance hands-on learning and interactive class activities, with the final goal of putting learning literally in your hands.