Why do we need sleep? 我们为什么需要睡觉？

Together, we discover that sleep isn't just "doing nothing" — it's actually when your brain gets busy behind the scenes, sorting through everything you learned that day and helping your body grow stronger while you rest. We also learn what happens to people who don't get enough sleep, and why it's so much harder to think, remember, and even feel happy without it.

我们会发现，睡觉并不是"什么都不做"——其实，睡觉的时候，大脑正在悄悄地工作，整理你这一天学到的东西，还帮助身体变得更强壮。我们还会认识那些睡眠不够的人会怎么样，了解为什么少了睡觉，思考、记忆，甚至开心都会变得更难。

Perfect for little listeners aged 5–8.