This book has been graded for interest at 8-12 years.

There are 86 pages in this book. This book was published 2006 by Alfred A. Knopf Books for Young Readers .

KATHLEEN WEIDNER ZOEHFELD has been a children's books editor and writer for thirty years and have always kept one eye on curriculum needs, especially in science. She has written other books in the National Geographic Kids Readers series including, Dinosaurs and Rocks and Minerals .