The third title in TIME For Kids' highly successful X-WHY-Z series. These colorful pages introduce children ages 4 to 8 to the natural wonders of space, with beautiful images and simple text that is perfect for beginning readers or for reading along. TIME FOR KIDS brings you the third title in the highly successful X-WHY-Z series. These colorful pages will introduce children ages 4 to 6 to the natural wonders of space, with beautiful images and simple text that is perfect for beginning readers or for reading along. The book will explain basic concepts of planets, stars, asteroids and space ships, beginning with what is most familiar to kids and expanding throughout the universe.