DIY Stethoscope With 3 Simple Items at Home!

Ever wonder what your heartbeat sounds like up close? 🔊 In this fun and fast DIY science experiment, we’ll show you how to make your own working stethoscope using everyday items — a balloon, funnel (or soda bottle), and plastic tubing! You don’t need medical tools to explore the amazing science of your heart. 🫀

Learn how vibrations from your chest turn into sound waves you can actually hear — all from home! This project is part of our Everyday Awesome series, where we break down cool science with simple tools. It’s perfect for curious minds, STEM educators, students, or anyone who loves learning through hands-on fun.