Several different modes of transportation, such as trains, planes, and cars, need motors and gears to properly run. Motors and gears also power many other machines. Throughout this age-appropriate text, which places emphasis on common science curriculum topics, readers are exposed to various devices that utilize motors and gears and are given a stronger sense of how these parts work. Bold, full-color photographs and diagrams are included to help young learners visualize the STEM concepts presented within the text. Informative fact boxes also provide extra insight into this fun topic that explains the science behind everyday machines.