Why is the Sky Blue!?

http://theconversation.com/curious-kids-why-is-the-sky-blue-and-where-does-it-start-81165

Many times while being in a classroom setting, students have asked me, "Why is the sky blue?" for a long time I couldn't answer the question myself, until I researched it and learned about. Attached is an interesting article about why the sky "is blue."