Sound and light travel through our world in waves. My Physical Science Library: Communicating with Signals and Patterns teaches young readers about the ways in which we can communicate using light and sound. It investigates and explains signals, patterns, vibrations, and waves of light and sound.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.