Talking through a tin can is a wonderful science experiment, not just to teach children how sound waves travel, but it can also illustrate how important concepts are passed from generation to generation. Your students’ grandparents may have made tin-can phones as children, so this could be a great conversation starter for the next visit. As Psalm 103:17 says, “But from everlasting to everlasting the Lord’s love is with those who fear him, and his righteousness with their children’s children.”
– Two clean empty tin cans
1. Using the nail and hammer, make a hole in both cans.
2. Cut the string so that it can reach from one end of the room to the other, but is pulled tight.
3. Thread the string through the holes of each can (Make sure the flat ends are facing each other and the empty ends are facing out.), tying a knot inside the can.
4. Stand on one end of the room, pulling, so the string is tight. Say something into the can.
5. Have the person with other can tell repeat the message.
When you talk into the can the sound waves vibrate along the string and send the message into the other can, making them work like a telephone.
Faith traditions and family values are often passed from one generation to the other. Even if your grandparents aren’t living anymore, their message can be passed along through family members. They are like the string; the grandparent is the can, and you are the other can!
Wisdom gets passed along like Psalm 103:17 states: “But from everlasting to everlasting the Lord’s love is with those who fear him, and his righteousness with their children’s children.”
You might also be interested in these other awesome science experiment ideas!
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