Think you know everything there is to know about your body? Think again! This super cool activity book contains all the secrets about your brain, muscles, skin, eyes, and more. Have a blast as you scan interactive QR codes to watch incredible videos to see what's inside a cell, learn how X-rays work, what makes your fingerprints unique, and more. Read and find out that you were born with roughly 300 bones, how your body makes 25 million cells every second, and how you can make yourself faster, stronger, and fitter than ever through fun, physical games. Work out brain-teasing puzzles, quizzes, crosswords, word searches, and other awesome activities to discover how the human body works and why you're one of the most advanced living things on the planet!.