The Best Book of Fossils, Rocks, and Minerals

This book was and is a big hit with my four-year-old. Clear, easy-to-understand text and big, bright illustrations make the book accessible to young readers. It is neatly formatted into two-page "chapters" focusing on specific topics, which makes it easy for him to "look up" whatever he's interested in that particular day. It also has useful tips for starting a rock collection, and (important for parents) convenient ways to store said collection. I recommend this book to any parent with a child interested in any aspect of geology.