First Scholastic Printing, 1992, Large Paperback, 127 pages written and illustrated by Linda Allison Assisted by David Katz PhD. "This is a book to help you explore the amazing territory that is inside the bag you live in that you call your skin. It will show you experiments to try, tests to take, and tools to make that will help you see and feel and hear what is going on inside. You'll amaze yourself." This is an excellent science book for middle grade children; however, has useful information for anyone at any age. Reading Level 5.