This book is part of a book series called Lets-Read-And-Find-Out Science .

This book is aimed at children in primary school.

There are 40 pages in this book. This book was published 2000 by HarperCollins Publishers Inc .

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 .