Do You Dare To Read Some Gross Facts For Kids?!

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As a teacher and a parent I know that kids love reading about crazy facts. Even better if they are gross facts for kids! I managed to find ideas for these facts from an awesome book called 5000 Awesome Facts (about Everything!). I hope you enjoy them and you should definitely check the book out- it’s awesome!

Opinions don’t affect facts. But facts should affect opinions, and do, if you think rationally. -Ricky Gervais


  1. Nail fungus is able to cause toenails to go flaky, smelly and yellowish brown.
  2. When a human embryo starts developing, it develops from the anus first. This is because humans are actually part of a sub-species known as the ‘deuterostomes‘. When a deuterostome embryo develops a hole is created, called a blastospore, which ends up becoming the anus.

    Gross facts for kids
    Human embryo development. Image taken from Wikimedia Commons

  3. The loudest burp that has ever been recorded actually matched a speaker at high volume.
  4. Mites live in an adult’s faeces, buried head first in their hair follicles.
  5. People with allergies in many cases are actually reacting to the poop from dust mites.
  6. Skin mites can’t live long because they can’t actually poo, which means they die when their bodies fill up with their own faeces. After dying, they then decompose on your body.
  7. Your body makes about 1.5 liters of mucus every day!
  8. A typiclal heart is able to squirt blood 9 meters away if an artery is ruptured. This is due to the blood pumping blood at high pressure.

    Gross facts for kids
    Pig Heart image taken from Wikimedia Commons

  9. Usually a person passes gas as much as 20 times a day.
  10. The natural vanilla flavouring that you might find in your food could actually come from the goo found in a beaver’s rear end.
  11. Once a British man moved 17kg of maggots from one tub to another with his mouth.
  12. Some of the most expensive perfumes use sperm whale vomit, known as “ambergris”.
  13. Rabbits need to eat their own poo in order to get the fungi and bacteria from it because if they don’t they get very sick.
  14. When horseflies land on your food they spit saliva in order to break the food down and then they sop up the goo with their mouth parts that act like a sponge. Yuk!
  15. A pork tapeworm, which normally lives in the intestines, once made its way into the brain of a woman.
  16. A Japanese man once ate 8kg of cow brains in 15 minutes.
  17. Once, an Australian boy spent almost a minute in a box with 125 golden orb spiders.

    Gross facts for kids
    Female Golden Orb Spider. Image taken from Wikimedia Commons

  18. A leech can live for up to 6 months without eating.
  19. Mucus, dead cells and other bits of debris can get caught in your tonsils and stick together. Bacteria then feed on these lumps, called tonsil stones, and cause bad breath. Yuk!
  20. Some people suffer from a condition called ‘Exploding Head Syndrome’ which causes people to believe they hear a loud bang as they wake up. As you can imagine, this can be an extremely scary experience. It is unknown what the cause of this strange condition is but the American Sleep Association propose that anxiety and stress could play a role.
  21. Using leeches in medicine used to be a thing of the past, until doctors began using them again in patients to reduce swelling after surgery.

    Gross facts for kids
    Leech in water. Image taken from Wikimedia Commons

  22. The dust in our houses is made up of flakes of dead skin, dirt, flour, sand, insect droppings and their exoskeletons.
  23. Your snot is clear when you’re well, yellow-green when you’re unwell and is sometimes black if there is a fungal infection in your nose.
  24. When you are sick you actually still produce the same amount of snot as when you are well, it’s just that it’s thicker, so it’s more noticeable.
  25. Most digestive gas doesn’t actually smell. It’s only when it contains tiny amounts of sulphur that it makes a bad smell.
  26. People don’t mind their own smell of gas when they break wind because they become used to the unique smell of odours created by their own guts.
  27. An Australian man used blood to paint his own pictures.
  28. Once an operation had been done to remove extra fat from the body of an artist in Florida, USA the artist used that fat to make soap that sold for $1000 per bar.
  29. Digestive gas is produced from trillions of bacteria that live in our guts and they are useful to us because they break down the food we can’t.

    Gross facts for kids
    Photo by Sharon McCutcheon on Unsplash

  30. Doctor’s once removed a tumour that weighed 23kg, which is ten times more than what tumours usually weigh.
  31. Gas gangrene is the name for death and rotting flesh and formation of gas in a wound after an infection from bacteria found in soil. This infection can be fatal.
  32. Once researchers studied digestion by collecting digestive gases from participants and then asked others to judge how bad each one smelt.
  33. People are thought to first get bedbugs when they shared caves with bats.
  34. The bad smelling sulphur in digestive gas is actually beneficial to us because it can protect cells from disease.
  35. A woman who wore her contact lenses for 6 months straight ended up going blind because amoebas (single celled animals) consumed her cornea (the outer layer of her eye).

    Gross facts for kids
    Contact lens. Image taken from Wikimedia Commons

  36. Those people with chocolate allergies might actually be allergic to cockroach body parts found inside the chocolate.
  37. When most people consume asparagus their pee begins to smell strange because it contains an acid that can only be found in asparagus.
  38. Botfly larvae found in South and Central America can burrow into mammal skin where they are able to grow as long as a quarter coin.
  39. Most people think that the brain is made of a hard material, it is actually soft- similar to soft butter.

Check out this awesome video!

I love this National Geographic video on weird but true and gross facts for kids. Learn some of them for yourself to gross your kids out and impress them with your weird knowledge, or share the video with them too! Have a look- I think some of these facts will surprise you!

Final thoughts

Everyone is entitled to their own opinions, but not their own facts.-Daniel Patrick Moynihan (American Sociologist and U.S. Senator 1927-2003)



I hope that you enjoyed reading these gross facts and well done for making it to the end! If you love fact books, (like me!) definitely check out ‘5,000 Awesome Facts (About Everything!)’, kids will love it!

I have written a few other posts about great facts for kids. If you liked this one, you should check out this post about unbelievable facts for kids. If you enjoy fun science facts you will find this post good too!

Finally, if you have anymore gross facts that you would like to share, or if you have anymore comments then please leave a message in the comment box below. I’d love to hear from you! 🙂

1 thought on “Do You Dare To Read Some Gross Facts For Kids?!”

  1. I have heard an anecdote about a fish in a country in S.America that is adept at swimming up the stream of urine as males relieved themselves, entered the penis and attached itself to the inner wall of the urinary tract with microscopic hooks. Apparently surgery is the only way of dealing with this uninvited guest.

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