Explains the importance of light and sound in the universe and describes what scientists have found out about them.

-- Amazingly in-depth reference books covering physics, chemistry, biology, information technology, earth sciences and astronomy, with up-to-date information on

Uses activities and experiments to introduce the properties of light and sound.

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! Young readers will learn how we send and

Kids like to ask questions about how everything works, and here's where they can find the answers. These books cover basic science concepts with vivid photograp