Book excerpt: Ever look at the sky and wonder what makes it so blue? Or watch shadows shrink and grow as the day goes on? Find out the answers to these questions (plus 38 more!) with a book that explores color and light. Shine a Light on Light Itself! From mesmerizing colored shadows to groovy glow-stick dissections, from totally cool laser play to DIY kaleidoscopic reflections, Exploring the Science of Light is a kid-friendly, hands-on discovery guide for investigating light, color, and optics. Brought to you by the world’s most beloved and fun-filled laboratory of all, the Exploratorium in San Francisco.