Whether it's a bicycle, car, or roller coaster, vehicles would not be able to function without wheels! Readers explore the importance of wheels in this exciting volume that includes vibrant photographs and illustrations, engaging diagrams, and accessible text, each of which helps illuminate the science behind wheels and how we use them in everyday life. Fun examples and facts support STEM curricula and foster a sense of curiosity and a desire to keep learning outside of the classroom. A concluding glossary furthers readers' understanding of the science behind these essential simple machines.