The dazzling Ray illuminates how light works—part of the Science Pals series, including Drop: An Adventure through the Water Cycle and Puff: All About Air Meet Ray. He's light! And he's been shining since time began. Wherever there's life on Earth, there's Ray, helping everything under the sun thrive. And Ray can really move— fast. Have you ever hurtled through space? Become a rainbow? Made food for plants? Ray has! With brilliant wit and sparkling one-liners, Ray introduces readers to a light show like no other. Filled with awe-inspiring artwork, funny asides, and a spotlight on kid-enticing facts, Ray invites us to bask in his warmth, as he illuminates our world. "[A] refreshing combination of charm and solid fact [and] a high-wattage spotlight on our most important power source." — Kirkus "[A] brilliant addition to the Science Pals series. . . . Every part of the book is packed with fascinating facts and tidbits. [Kids] will appreciate Moon's inviting approach." — Booklist