You will find that keeping the line taut is the key to making the string telephone experiment work. The vibrations are converted to sound waves, and that’s why the person can hear through the other cup. These vibrations travel along the string and then vibrates the cup on the other end. When you speak into a cup, your voice vibrates the air inside the cup, which in turn vibrates the bottom of the cup. The vibration is what creates sound waves. Have your kids hum a song while holding their hands against their throats to feel the vibration. When we speak, our vocal cords make molecules in the air vibrate. The string telephone is the perfect experiment to explain to your kids about sound waves. The Science Behind the DIY String Telephone Is there noise in the background? If so, go to a quiet area.Is the string touching another object besides the cups?.If your kid can’t hear the other person with the paper cup telephone, check the following: Have one kid put the paper cup to his/her ear and have the other one softly speak into his/her paper cup.Have your kids take each paper cup and walk away from each other until the string the taut.Grab the other ends of the paper clips and pull the paper clips and string through.Stick the paper clips in the small holes at the bottom of the paper cups.Repeat #2 with the other end of the string.Tie a knot with the string at one end of the paper clip.Cut a small slit on the bottom of each paper cup.
PAPER CUP DESIGN NAME HOW TO
If you don’t remember doing this when you were a kid, here is a little reminder! How to Make a Telephone with Cups and String Supplies: My kids loved this paper cup phone STEM project and used the string telephone to play educational games. Get your kids talking with this string telephone that you can make with just a few items you probably already have around the house. So it takes a little work to explain why we need a string to transmit the sound. What a different world we live in! We haven’t had a landline for the longest time, so our kids have no clue what a traditional telephone looks like. It’s funny to discuss how telephones work with our kids nowadays. Do you remember making a paper cup phone when you were in elementary school?
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