What makes a bicycle go? Why does it rain? Can dolphins talk to each other?Discover the answers to these questions and more in this beautifully illustrated hardcover guide. Great for home learning, curious kids will find lots to love as they learn over 500 incredible facts about animals, Earth, space and more! Its clever question-and-answer structure and clear, accessible language make it a great way to discover the world. Young readers can explore topics of perennial fascination, such as:• Wild animals• Oceans• Dinosaurs• Outer space• Our planet• How machines work Complex ideas are set out in clear, easy-to-understand terms, with colorful and engaging illustrations that bring these facts to life. It even includes six fun quizzes to put your new knowledge to the test. The perfect gift for children who always ask "Why?"