The Earth Author:Playmore, Inc Is the Earth a solid ball of rock? — How many earthquakes occur every day? — How was the Grand Canyon formed? — Readers will learn all about the Earth and its amazing features while doing a variety of challenging and fun activity such as picture puzzles, secret codes, and word searches. Each page is easy to read text that will spark a child's sens... more »e of wonder and a desire to learn more about the Earth. Includes 50 reusable stickers!« less