This book is part of a book series called My Science Library .

This book has been graded for interest at 6-8 years.

There are 24 pages in this book. This book was published 2011 by Perfection Learning .

Kristi Lew is a former high school science teacher with degrees in biochemistry and genetics. After years in the classroom and cytogenetics laboratories, she is now the owner of a professional K-12 educational writing service that specializes in writing nonfiction science books for students and teachers. Amy S. Hansen has written twelve books for children, most of them about the science of everyday life. In addition, she has written for several children's magazines, including Highlights for Children, Cricket, Ask, and Click. her electronic encyclopedia, Earth Explorer, received a Parents' Choice Award from the Parents' Choice Foundation. She lives in Greenbelt, Maryland