Did you know that it takes 40 muscles to frown, but only 15 to smile? Little fingers and curious minds will be in awe of the ZooBooKoo Educational Human Body Cubebook as they learn facts and figures about the human body. With each turn youngsters will learn more and more about the human body, covering all major body systems including the heart, lungs, water works and digestion. Eyes, ears, bones, muscles, blood, nerves and the brain! A fun, fact-filled ready-reference Human Body Cubebook. With a tactile and fun design children of all ages (and even adults!) will be intrigued and ready to learn!