Make a Stethoscope

Stethoscopes are used to listen to a person’s heart. We can make a very basic stethoscope easily.

  Make a Stethoscope

What you need:

Kitchen roll tube

Gaffer tape

Small funnel


First try using just the kitchen roll tube. Place on a friend’s and listen. Can you hear their heart beating?

Next tape the funnel into one end of the kitchen roll. Listen to a friend’s chest again, does it sound clearer?

Make a prediction –  what do you think would happen to your heart rate if you did some star jumps? hint – will the heart have to beat faster?

Trying counting the number of beats before and after some exercise. Can you record this data on a chart?




Stethoscopes used by doctors consist of a chest piece, rubber tubes and earpieces. The chest piece consists of a diaphragm and bell which amplify the sound of the heart beating so the doctor can hear it.

Extension activity

How could you make the stethoscope better? What if you used a hose with a funnel at each end? Or different sized funnels? Which do you think would work the best?


Complements KS2 Science

Learning about the body, planning experiments and making predictions.

Related Posts

Learn about the body

Doctor Role Play


Author: Emma Vanstone

Science Sparks, is a site dedicated to making Science fun for kids. I’d love you to follow me on my Google Profile+.

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  1. This is so neat and simple! My girls just recently got to hear our puppies heartbeat at the Vet’s office and they were thrilled. I bet they would love to try this. I wonder if they’d be able to hear the baby I’m expecting’s heartbeat…time for a science experiment!

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  2. You know, I think this would be a wonderful way to explore sound in general. I think you should rename this as a sound machine or listening machine:) We purchased little phones that let the children hear their own voices. The goal is so they can begin to hear the sound they make when working on phonics or phonemic awareness. Your stethoscope reminds me just a bit of our phones.

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  3. This is fantastic I’m going to be making one to help T understand what the doctors are doing with her.

    Thank you so much for linking up to Tuesday Tots and just to let you know I will be featuring this over on Rainy Day Mum this week.

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