Make an improvised Stethoscope using a plastic funnel, a rubber tube, a balloon and a rubber band. Measure, and compare, the heart beat of all the members of your family using this.
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1 Method 1 of 3: Making a Simple Stethoscope
Cover the top of a funnel with a balloon. ...
Wrap electrical tape around the balloon to hold it in place, if needed. ...
Stick the end of the funnel into a piece of clear, flexible, plastic tubing. ...
Add a second, matching funnel to the other end, if desired.
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