Germs and Handwashing, Explained for Kids

You call everyone to dinner. Your four-year-old runs in from the backyard and climbs onto his chair, fingers brown from the sandbox. “Hands, please.” He shows you the cleaner side and says, “They’re not dirty.”

Children don’t skip handwashing to be difficult. Germs are invisible, so the rules feel like grown-up fuss. Once children understand germs, and washing becomes a fun, same-every-time routine, the habit starts to stick.

In one minute

• Most 3-year-olds can wash with help, and many 5 and 6-year-olds can do it alone, with reminders.
• Explain germs as tiny living things too small to see. Most are harmless, and some even help us, but a few can make us sick. They travel on hands, coughs and sneezes.
• Make it the same every time: wet, soap, a 20-second song, rinse, dry. Wash before eating, after the toilet, after coming home, after blowing your nose and after touching pets.

What’s going on

Young children believe what they can see, and germs are a perfect mystery: everywhere, invisible, and responsible for runny noses. Without an explanation, handwashing is just another order. With a little science, it becomes a power: “I can stop germs.”

Soap loosens the germs and grime stuck to our skin so water can rinse them away. Warm or cold water both work; the soap and the 20 seconds of scrubbing do the job.

Habits form through repetition at the same moments every day. That’s why “before every meal” works better than “whenever your hands are dirty.”

Try today

1. Show the invisible. Rub a dab of lotion and a little glitter or flour on your child’s hands, then let them “shake hands” with you and touch a toy. Look how far the “germs” traveled. Then try rinsing with plain water, and see how much is left until soap and scrubbing take it off.
2. Pick a 20-second song. “Happy Birthday” twice, or the ABC song once. Sing it every time, for the whole wash: palms, backs of the hands, between the fingers, thumbs and nails. A step stool and a picture chart by the sink help.
3. Teach the elbow sneeze. Cough or sneeze into your elbow, “like a vampire,” or into a tissue, then wash. Practice with pretend sneezes until it’s automatic and a little silly.

If it gets worse at first. When you stop debating (“When your hands are clean, then we eat”), some children protest harder for a few days. Stay calm and friendly; the protests fade once the routine is clear.

The same answer from every adult. Ask grandparents, babysitters and the daycare which song and moments they use, and match them at home.

What to say

To explain germs, in a calm moment:

“Germs are so tiny we can’t see them. Some of them can make us sick. They ride around on our hands, so soap is how we send them away.”

At the sink, when your child says “they’re not dirty”:

“Germs hide even on clean-looking hands. When your hands are washed, then we eat. Happy Birthday or the ABC song?”

When your child doesn’t want to stay home sick:

“You’re sad to miss the playground. Staying home helps your body fight the germs faster, and it keeps your friends from getting sick too. That’s being a good friend.”

What to avoid

• Scary language. “Germs will make you very sick” can create anxiety. Keep it factual and positive: soap wins.
• Washing as punishment. “Go wash your filthy hands!” makes it a chore. “Germ-busting time!” makes it a game.
• Only telling, never showing. Wash your own hands at the same moments. Children copy what they see.
• Sanitizer instead of the sink at home. Soap and water work better, especially on dirty hands. When there’s no sink, use a sanitizer with at least 60% alcohol, rub until dry, and keep the bottle out of reach: swallowing it is dangerous for young children.

When to get help

Most colds and stomach bugs pass on their own with rest and fluids. Call your pediatrician if your child has a high fever that doesn’t come down or lasts more than a day or two, signs of dehydration (very little pee, no tears, unusual sleepiness), or if you’re worried. Call 911 if your child is struggling to breathe, has blue lips, or is very hard to wake.

If your child becomes very anxious about germs (washing over and over until the skin is sore, refusing to touch things, panicking when they can’t wash), talk to your pediatrician or a child psychologist.

Read together

In Being Sick, Whyia’s cousin Ethan isn’t feeling well but doesn’t tell his mom, because he wants to play. On the playhouse roof he loses his balance, hurts his hand, and his head aches. Whyia turns into a puppy and asks Luna, the doctor’s dog, what’s happening. Luna explains that resting helps the body focus its energy on fighting infection, that some infections spread through coughing, sneezing and touching, and that this is why we stay home when we’re unwell, wash our hands often, and cover our mouths and noses. As they walk Ethan home, Phoebe’s mom shares her tip: tea, “like giving your body a warm, cozy hug.” (For little ones, let it cool to warm.)

After reading, do the glitter experiment together, then make a “germ-busting” poster for the bathroom with your child’s drawing of Whyia washing her hands.