Discover what your senses do, how your muscles work, and why you get dizzy!, Take a peek inside the brain, watch the hea... (more)
Discover what your senses do, how your muscles work, and why you get dizzy!, Take a peek inside the brain, watch the heart pump blood around the body, and find out how fast fingernails grow. Test your knowledge and have hours of fun with eight pages of awesome activities! Book jacket. (less)