How to Make a Stethoscope for Kids' Play

You can make a working stethoscope with household items.

Kids are curious about how their bodies work, and a stethoscope is a great way to teach them about their heart. A stethoscope allows them to hear their heart pumping blood, but you don't have to buy an expensive medical stethoscope; you can help kids build their very own working stethoscope at home.

Things You'll Need

• Two small funnels, 3/8-inch spout
• Flexible plastic tubing, 1/2-inch diameter
• Balloon
• Tape
• Rubber band

Instructions

1. Cut a piece of 1/2-inch flexible tubing 12 inches long. The tubing is used to carry vibration from one funnel to the other.

2. Stretch a balloon tight over the wide end of one funnel. Roll up any excess balloon edge. Use a rubber band to help hold the balloon in place.

3. Firmly push one end of the tubing over the spout end of the funnel that has the balloon on it. Cover the spout end with the tubing at least 1/2 inch. Tape the tubing to the funnel.

4. Make the earpiece by firmly pushing the opposite end of the tubing onto the spout end of the other funnel. Cover the spout end with the tubing at least 1/2 inch, and tape the tubing to the funnel.

5. Place the open funnel near your child's ear.

6. Place the funnel with the balloon over your heart, and ask your child if she hears a thumping noise. The beating heart makes vibrations, which makes the balloon vibrate. The vibrations travel through the tubing and amplify in the funnel as "thump" sounds.

7. Help your child to listen his own heart.

Tips & Warnings

• Ask your child to listen for differences in heart sound and speed after they have exercised.

• In addition to the stethoscope, let your child wear and adult size white button-up shirt for doctor pretend play.

References

• Teachervision: Make a Stethoscope
• Science Kids: Stethoscope Project

Resources

• Maidu Excelsior Parent Teacher Club: Sound and Vibrations