Why do you get sleepy?When you feel tired, your body is telling you that it needs a rest. Everyone needs sleep. Babies need lots of sleep. Grown-ups need less. But no one can go without sleep for long. A team of scientists stayed awake for as long as they could to see what could happen. Read and find out some wide-eyed facts about the science of shut-eye.

This makes the complex digestion process accessible for early readers through simple illustrations and methodic presentation of important details. Concepts layer throughout to eventually convey a bigger picture that makes sense and becomes practical for understanding health and wellness.

In this basic introduction to the skin and its functions, four children take turns presenting different aspects of the skin, such as pigment and melanin, cuts and healing, fingerprints, and the sense of touch.