This book is part of a book series called I Wonder Why .

This book has been graded for interest at 5-8 years.

There are 32 pages in this book. This book was published 2004 by Kingfisher .

Miranda Smith is a long-standing editor of information books for both children and adults. She has a particular interest in the field of natural history and has written books and articles for children on the subject. Her books including Navigators: The Human Body and Navigators: Animals.