Book #1 · Picture Book · Ages 8–12 · 1997
Understanding Your Muscles & Bones
Discover the secrets beneath your skin.
32 pages
Library Binding
Summary: Explore the hidden world beneath your skin, where muscles and bones work in harmony to power every leap and sprint. Uncover the mysteries of your body's inner mechanics and learn how they enable your every move. What secrets will you find beneath the surface?









