Sound Wave
Light Sound and Waves

Growler

Enrichment Activity for 5-11 11-14


What you need

  • Cardboard box
  • Pencil
  • String
  • Wet cloth

Instructions

  1. Make a hole in a cardboard box.
  2. Tie some string round a pencil, and feed the string through the hole so the pencil is inside the box.
  3. Use a wet cloth to pull on the string.

Results and Explanation

The box amplifies the vibrations from the string as the cloth is pulled along it, making a sound that our ears can hear.

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