Inside Your Body! Fun Human Body Facts

Did you know your nostrils take turns breathing? Shrink down and explore your own body on a pick-your-path trip full of fun human body facts. For kids 3–7+, free to preview.

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Illustration from Inside Your Body! Fun Human Body Facts

Ready? Let's shrink down. Smaller, smaller, TINY! Now ride a breath up your nose, into your body. But wait. Something strange is happening. Your two nostrils take turns! One does most of the breathing while the other rests. Later, they swap!

Down the tunnel we go, into your throat. Careful! Here comes a swallow. See that flap swing shut? Your epiglottis closes every single time you swallow, so your food takes the right road down. You never even have to think about it.

Now we're in your chest, where your two lungs live. But look! They don't match. Your left lung is smaller than your right, with a dent scooped out of one side. Guess what fits in there? Your heart! A perfect little cubbyhole.

This way, the muscle that gives you hiccups. That way, a heart that never gets tired!

Fun human body facts for kids

Inside Your Body! is an interactive story that takes kids aged 3 to 8 on a trip through their own body. We shrink down tiny and explore the lungs, heart, brain, bones, stomach and skin, with every page written to be read aloud together. Here are some of our favourite fun human body facts.

Your stomach is tucked up under your ribs on the left side, not behind your belly button.
Sweat has no smell at all. The stink comes from tiny bacteria that live on everyone's skin.
You grow a whole new outer layer of skin about once a month, and the old one flakes away.
More than half of your bones are in your hands and feet, and some of your wrist bones aren't finished growing yet.
The smallest bone in your body is inside your ear, and it's smaller than a grain of rice.
Bones aren't solid all the way through. Their soft middle, called marrow, makes new blood cells.
Messages from your brain zoom along your nerves faster than a race car.
The picture that lands inside your eye is upside down, and your brain sorts it out so fast you never notice.
Your bottom two pairs of ribs aren't joined at the front, so they're called floating ribs.
Your eyebrows help steer sweat away from your eyes.
Your fingernails grow faster than your toenails.

What's inside the story

The journey starts up the nose and down into the chest, then follows either the air through the lungs or the blood from the heart. From there it opens into four paths, each exploring one part of the body: the brain and eyes, the bones, the stomach and intestines, or the skin and hair.

The story has 28 pages, four paths and four different endings, and every ending leaves kids with something to notice or try on their own body. Every fact is checked, and the whole story is narrated for read-aloud time together.

Funny, weird and gross human body facts

What are some funny human body facts for kids?

Goosebumps are a funny one: every hair on your skin has its own tiny muscle, and when you're chilly or excited they all pull tight at once. Your voice is funny too. It comes from two stretchy vocal cords wobbling as air rushes past them, which is why humming makes your throat buzz.

What are some weird human body facts?

Your blood makes a full trip around your body, down to your toes and back, in about one minute. In the tiniest blood tubes, the blood cells have to line up and squeeze through one at a time.

What are some gross human body facts kids love?

Your stomach squashes and swirls your food with juice until it turns into a kind of soup. Most of the gurgling you hear comes from your intestines, a long tube folded up in loops, and it rumbles whether you're hungry or not.

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