Budding Scientists: The Mystery Behind “Ahchoo” – Why do we Sneeze?
Preschoolers
by LearnX Science
Has any of these ever happened to you?
You are having a ball of a time playing with your pet cat or dog, but suddenly, you feel a tickle in your nose, and you let out a loud “ahchoo”. You continue sneezing for a few minutes and only stop when you move away from your pets.

Your family decides to do some spring cleaning at your house. As you start cleaning the dusty corners of your room, your throat feels scratchy, and your nose gets itchy. You start sneezing uncontrollably and only feel better once you move away from the dust particles.

Every time you walk past the flower pots outside your home, your nose starts to run, and you start sneezing non-stop for a few minutes.]

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Have you wondered why this happens?
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What causes your body to react to these situations and cause you to sneeze?
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What happens inside your body when you sneeze?
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Do you think we ever stop sneezing?
Let’s think about these questions as we unravel the science behind sneezing in this learning package.
LET'S SING TOGETHER
Let’s sing a fun song called Twinkle Twinkle Little Sneeze, to the catchy tune of the famous Twinkle Twinkle Little Star song. You can also sing this song anytime you or those around you sneeze. Add your own words, actions, and props to make it more exciting!

Sing along to the tune of Twinkle Twinkle, Little Star
LET’S LEARN: THE SCIENCE BEHIND SNEEZING
Sneezing refers to the sudden, forceful, involuntary expulsion of air from your nose and mouth. It is caused by a form of irritation to the mucous membranes of the upper respiratory tract. In a way, sneezing is good as it helps to get rid of unwanted particles trapped in your nose. However, at the same time, it can quickly spread germs around especially when you do not use a tissue or cover up properly.
DID YOU KNOW?
The scientific name for sneezing is STERNUTATION (stern-u-tation). This word originates from the Latin term “Sternere” which means sneezing.
Now, let’s try to pronounce sternutation together! It is a long word, so remember to break it up!
S T E R N U T A T I O N
Well done! You have successfully learned a new word. Now, are you up for the challenge of learning how to spell the word on your own? Give it a try!
THE SNEEZING MECHANISM
You may think of sneezing is a simple process that only involves the use of your nose and mouth to get rid of irritants trapped inside your body. However, it is actually an elaborate process! It involves a lot of coordination from many different parts of your body. What are these parts? Let’s find out more!
When there is any form of irritation in the air, such as smoke, dust or fur, the inside of your nose gets a tickle, and a message is sent to a special part of your brain called the sneeze centre. The sneeze centre then sends a message to some important muscles that must work together to create a sneeze.
Here’s a simple summary of the process. If you are up for a challenge, try and explain this process to your parents, siblings, or friends using just these pictures.

Summary of the sneezing process
TIPS FOR PARENTS
One of the most effective ways to help your child learn and retain new information is by getting them to teach or pretend to teach what they have learned to others. This is a psychological phenomenon known as the protégé effect.
As STEAM concepts are still new to your child, getting them to share what they learn in their own creative ways not only develops their understanding of the concepts, but also gain confidence to learn more. They also form positive memories with this experience, further developing their interest in such STEAM concepts. Encourage your child through relevant prompts and providing words of acknowledge and encouragement.
WHAT ARE THE ORGANS & MUSCLES INVOVLED IN THE SNEEZING PROCESS?
The body parts and muscles that need to coordinate together to create a sneeze are the:
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Nose
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Mouth
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Abdominal (belly) muscles
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Chest muscles
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Diaphragm (the large muscle beneath your lungs that makes you breathe)
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Muscles that control your vocal cords
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Muscles in the back of your throat
Do you know where these body parts and muscles are located? Download the activity sheet titled “My Body Parts” (pg. 1) and see if you can identify them. You will need some colour pencils and markers for this activity.

My Body Parts Activity
LET'S WATCH: A RECAP OF WHY WE SNEEZE
Besides reading books, you can also try watching relevant educational videos or play interactive games to better understand and remember the concepts. Try mixing different modes of learning! However, do remember to limit your screen time according to what your parents have set for you.
Let’s watch this short video, which recaps key points on the scientific process of sneezing. You can pause or rewind any section if you need more time to process the information shared.
Once you have watched the video, complete this short trivia quiz (pg 2-3) to answer some questions based on the information provided in the video. Let’s see how many questions you can get right! If you are stuck, just go back to the video and look for it.


TIPS FOR PARENTS
According to the American Academy of Paediatrics, you can begin introducing high-quality internet time (e.g., access to educational content) for children above 18 months old.
However, do set a time limit when accessing such content. For children between 1.5 to 3 years old, Health Hub SG recommends limiting screentime to less than an hour a day.3 There are various Science-themed channels for children available on platforms like YouTube which feature short videos with animated bite-sized videos such as the above to capture their attention. Watch these content together with them. When doing so, discuss the concepts raised, address any questions they might have and participate in the activities together with them. Doing this ensures a safe, healthy, and productive use of screentime for them.
LET'S READ!
So far, we have learned about the factors that cause us to sneeze and how our various body parts and muscles work together to create a sneeze. It is now time to learn about how we can take care of ourselves and those around us when we catch the flu. Read the following book with your parents and learn how to take care of a sick pet!
Title: Dragons Get Colds TooAuthor: Rebecca Roan
Publisher: Bloomsbury Publishing, 2019
Section: Early Literacy Picture Books / Fiction
Call No: English ROA
Overdrive link: https://nlb.overdrive.com/library/kids/media/4555008
TIPS FOR PARENTS
Researchers have found that scaffolded interactions between children and adults during reading which develop their literacy, narration, and comprehension skills. This is also known as dialogic reading. During this process, your child will be storyteller and you will be the listener. To engage them, ask them insightful question.
One way to do this is to use the C.R.O.W.D technique. Under this technique, you can ask 5 types of questions. These include : (1) completion prompts (getting your child to complete a sentence); (2) recall questions (asking questions that require your child to reflect or look back on the story); (3) open-ended question (focusing on certain images and phrases and asking your child to explain further); (4) 5Ws & 1 H question (asking questions that start with who, what, where, why and how) and (5) distancing questions (asking questions that relate to your child’s personal experiences).
Here are some examples of the C.R.O.W.D questions you can ask based on Dragons Get Cold Too!.
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You can tell if the dragon is sick because the temperature shows_________? (Comprehension question)
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Why do you think the dragon fell sick? (5W+1 H question)
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On pages 7 and 8, the little girl is trying to make a nutritious meal for her sick pet, can you look at the food items found and identify their names? Do you think these food items are nutritious enough? Why or why not? (open-ended question)
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What are the 7 things that you must do in order to help your sick pet recover quickly? (Recall question)
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Remember the time when you caught a cold. Can you tell me what did you do to get better? (Distancing question)
Remember that there are no right or wrong answers. Encourage your child by using adopting encouraging phrases like “that is interesting, tell me more”.
LET’S PLAY: ACTIVITIES TO DO!
Engaging in such hands-on activities are important as they not only help us to enjoy learning, but also broaden our understanding on the Scientific concepts which we have just learned. The following activities can be conducted using simple everyday household items. You can do them with your family and friends for more fun!
CLEAN HANDS SENSORY BAG
We can easily prevent ourselves from catching a cold through adopting thorough hygiene habits. One way is to regularly wash our hands with soap and water. However, this is easier said than done. At any given moment, we are touching so many items – from our pets to pencils. So how can we remind ourselves on keeping our hands clean? Let’s do this by creating our very own clean hands sensory bags. Get your parents to help you with this activity!
Items needed:
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1 Ziplock bag (medium sized)
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Permanent marker
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Pom poms
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Gel
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1 brush or sponge
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1 cardboard paper, which should be the same size or slightly bigger than the Ziplock bag
Step 1: Place both of your palms on the Ziplock bag.
Step 2: Get your parents or an adult to help trace the outline if your hands on the Ziplock bag. Ensure that you are using a permanent marker so that you can see the outline of your hands palms clearly.
Step 3: Open the Ziplock bag and slowly pour some gel, until the Ziplock bag is about half full. Be careful not to pour too much gel.
Step 4: Throw in some pom poms into the Ziplock bag containing the gel. Then, seal the Ziplock bag tightly.
Step 5: Now, you can use a brush to “clean” your hands by moving the pom poms out of your palms. These pom poms represent the germs in your hands. By removing them using the help of the brush, you are ensuring that your hands are clean. This prevents you from catching a cold and spreading germs to those around you.
Step 6: You can tape the Ziplock bag at your fridge or table as a reminder of the importance of washing your hands daily.

Sample image of your clean hands sensory bag
“COVER UP PLEASE” CRAFT ACTIVITY
Sometimes, some germs are just so strong and infectious that despite washing our hands diligently, we may still catch a cold. When this happens, it is important to ensure that we use a tissue to sneeze into so that we can prevent germs from flying all around us! Here’s a simple craft activity that you can do to remind yourself to use a tissue or handkerchief the next time the flu bug hits you.
Items needed:
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1 Paper Plate
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Construction Paper
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Some coloured markers or crayons
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Scissors
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Glue
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Google Eyes (optional)
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Yarn (optional)
Step 1: On the construction paper, trace the outline of your palm.
Step 2: Once you have done this, get your parents or an adult to help you cut out the outline of your palm.
Step 3: Take your paper plate. Flip the paper plate inwards.
Step 4: Draw facial features such as eyes, nose, ears, and mouth as shown in the image below and then, colour them.

Sample image of facial features on paper plate.
Step 5: Look for your hand outline that you had just cut out. Align it across the mouth in the paper plate. Use your hand to hold it.
Step 6: Once you are done, use a glue or blue tack to stick the hand outline to the mouth area.
Step 7: Find a tissue paper and slot it in between the hand and mouth area of the paper plate. Your final product should look like the image below. You can hang your very own sneeze mascot at your table, fridge or somewhere visible as a reminder on the right hygiene practice when you are down with a cold.

Ta-da! You have very own sneeze mascot
LET'S READ MORE!
Supplement your learning with some of these book recommendations. You can find out more about these books on NLB’s catalogue or even in OverDrive.
Title: You Make Me Sneeze!
Author: Sharon G Flake & Anna Raff
Publisher: New York: Astra Young Readers, an imprint of Astra Books for Young Readers, 2024
Section: Early Literacy Picture Books / Fiction
Call No: English FLA
Title: Simon Gets Sneezed
Author: Adam Kay & Henry Paker
Publisher: London: Puffin Books, 2025
Section: Early Literacy Picture Books / Fiction
Call No: English FLA
Title: Wash Those Hands!
Author: John Townsend & Carolyn Scrace
Publisher: London: Hatch Press, 2025
Section: Early Literacy Picture Books / Fiction
Call No: English 613.4 TOW
Title: ACHOO!
Author: Simon Philip & Nathan Reed
Publisher: London: Bloomsbury Children's Books, 2022
Section: Early Literacy Picture Books / Fiction
Call No: English PHI
The copyright to all book covers belongs to the relevant publishers or illustrators.
For more wonderful books in our collection, look them up on our NLB Catalogue!