Why do we cry? Why is the sky blue? Why must children obey their parents? Find out the answers to these and many more questions in this clever road-trip book, in the tradition of the bestseller "The Way Things Work." In this fact-filled book, difficult questions are broken down and explained in persuasive, fun language that kids will relate to. Great for summer reading and back-seat entertainment, this book tackles the perennial puzzling questions and even provides a few important lessons in the process. Why does fire burn? What is infinity? Can wishes come true? These and 80 other burning questions are thoughtfully answered in this well-researched book.