It's pretty much impossible to imagine what our lives would be like without light energy. As this elementary-level STEM text explains, energy from the sun sustains life on Earth. Young readers will learn about the properties of light, what wavelengths are, the relationship between light and color, and how reflected light enables us to see things. Colorful photos and useful diagrams help illustrate the content presented, while sidebars prompt readers to think about what they have read. Teachers and students alike will appreciate this clear, age-appropriate introduction to a potentially challenging topic.