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

There are 144 pages in this book. This book was published 1999 by HarperCollins Publishers .

True Kelley has illustrated many favorite books for children in her fun-filled watercolor style, including several in the Let's-Read-and-Find-Out Science series. She and the author previously collaborated on What Makes a Magnet? and What the Moon is Like? True Kelley lives in Warner, New Hampshire. Vicki Cobb is the well-known author of more than eighty-five highly entertaining nonfiction books for children.