What are the smallest and largest bones in the body? Why do I sweat or freeze? And what is good for the body? In this book, children learn all kinds of interesting facts about the different parts of the human body. Using scenes from children's everyday lives, tiptoi explains to little explorers how their bodies work: When blowing bubbles, the lungs are in action, after the water fight the children have goose bumps and on the climbing frame muscles are in demand.