Why do we have to sleep?

1. 1

   Fuzz says

   All day long, your body and brain work hard. Sleep gives your body a long rest, so it can get ready for tomorrow. And while you sleep, your brain gets a chance to sort things out.

   For ages 4–7
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   Checked against Sleep (KidsHealth)

2. 2

   How does my brain sort things out?

   Every day, your brain soaks up new things, like a new song or a friend's name. Scientists think sleep is when your brain sorts all of that out and stores it away, a bit like tidying toys into the right boxes. So you wake up ready for a brand new day.

   For ages 7–11
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   Checked against Sleep (KidsHealth)

In Lil' Phil, reaching the bottom of this wonder earns a sticker for Fuzz's collection.

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  Why do I feel sleepy at bedtime?

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