Paper Cup Telephone

Make a classic string telephone with two paper cups and a long piece of string. Learn how sound travels.

STEMEducational
AgeAges 4–10
Duration15 min
DifficultyEasy
CostFree
LocationBoth

Educational Value

Introduces sound waves and vibration.

Materials Needed

Prep progress

Step-by-Step Instructions

  1. 1

    Poke a small hole in the bottom of each cup.

  2. 2

    Thread string through and tie a knot inside.

  3. 3

    Pull string taut and take turns talking and listening.

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