- Visually compelling photos and four-color illustrations help bring science right into the classrooms--or living rooms--of young readers.- These books will help prepare young scientists for upcoming mandatory science testing.- Earth is a wonderous planet--and What on Earth? will explore each and every facet of the planet in a way that will delight 2nd to 4th graders, librarians and parents alike No other series for this age takes such an in depth look at each subject covered.