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Tin Can Phones Experiment
 
Tin Can Telephones

Materials you will need:

• String
• 2 Tin Cans
• Masking Tape (optional)
• Very Small Philips Screw Driver

 
Steps

1.)  Wash both tin cans out with soapy water and dry them. Make sure that the openings of the tins are not sharp, if they they feel a little sharp be sure to secure masking tape along the opening.

               

2.)  With adult supervision – make a hole in the bottom (middle) of each tin can using the small screw driver. Make sure that you make a very small hole.

               

3.)  Cut string long enough so that you can reach different rooms or reach a long distance in the yard.

               

4.)  Thread the string through the hole at the bottom of the tin can so that the string has entered the inside of the tin can. Tie a knot big enough so that the string stays inside the can.

               

5.)  Repeat step 4 with the other tin can.

6.)  Hold one tin can and get someone else to take the other tin can. Walk the distance of the string so that the string in tight (not dangling).

7.)  Have one person hold the opening of the tin can over his/her ear while the other person speaks into the opening of the other tin can.

See how far you can go by using different lengths of string.

Sound travels by vibrations. The sound of your voice makes the string vibrate, carrying the sound to your friend’s ear.

Take this experiment outside so that you can enjoy the space and freedom from walls and doors of a house.

Check out how Sounds and Vibrations work on our Science Facts page below.

 
 
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