The Clock Inside You

Your body has a clock inside it.

It is not on the wall.

This clock tells you when to sleep and when to wake up.

When the sun goes down, your body makes a special juice.

It is called melatonin.

Melatonin makes you feel sleepy.

In the morning, the sun comes up.

Your body stops making melatonin.

Then you feel awake and ready to play.

But if you look at a bright phone at night, your clock gets confused.

The phone light looks like the sun to your body.

So you stay awake longer.

That is why you should put your phone away before bed.

A dark room helps your inside clock work well.

Then you sleep deeply, and you feel happy the next day.