Help illuminate the world of science for children. Fascinating information and experiments help show why light is the most important source of energy. Simple, clear text explains what light is and helps make difficult scientific concepts like reflection and optical illusions easy to understand. History boxes feature the scientists who made the discoveries and inventions. Readers will learn: how we see things around us, how to bend light, why your reflection is smaller than yourself, and how to make your own pinhole camera and periscope.