Duling 
Communicating with Signals and Patterns [PDF ebook] 

Sound and light travel through our world in waves. My Physical Science Library: Communicating with Signals and Patterns teaches young readers in kindergarten to grade 2 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. This 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