Sleep Is for Everyone: An Illustrated STEM Book on the Science of Rest for Children (Ages 4-8) (Let's-Read-and-Find-Out Science 1)
<p>Why do you get sleepy?</p><p>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.</p>