What happens if you don't sleep well? Which parts of your body never sleep? How many hours of sleep does your body need? Find the answers to these questions and much, much more in this picture-packed introduction to the human body. An ideal first introduction to biology and health, Why do I sleep? explores the human body and the importance of sleep with fun experiments and activities.


Why is exercise important? How do your muscles work? Why do you need oxygen? How can you improve your ball skills and cool down after a long game? Find the answers to these questions and much, much more in this picture-packed introduction to the human body. A hands-on first introduction to biology and health, Why do I run? explores the importance of keeping active, with fun experiments and activities.


Why is brushing your teeth important? How do you make sure your teeth are clean? Find the answers to these questions and much, much more in this picture-packed introduction to the human body. An ideal first introduction to biology and health, Why do I brush my teeth? explores the importance of personal hygiene with fun experiments and activities.


Why do we use soap? What is bacteria? How do germs pass from one person to another? Find the answers to these questions and much, much more in this picture-packed introduction to the human body. An ideal first introduction to biology and health, Why do I wash my hands? explores the importance of good hygiene with fun experiments and activities.