Zoom! What makes a car go fast, or slow down? My Physical Science Library: Fast and Slow teaches young readers all about speed and direction, including pushing, pulling, starting, and stopping.The My Physical Science Library collection introduces a variety of science topics for early learners based on physical science NGSS standards. From motion to energy supplied by the sun, these books present complicated information in easy-to-understand language and provide kid-friendly examples. Each book includes an activity that supports further comprehension.