Oak Park, Illinois
By Danielle D.
Glass bottles, the box that the bottles came in, black construction paper, gold and silver beads, paint, water and hot glue.
I set out all six bottles and put a certain amount of water in each one so that one had the most water and each one had a smaller amount of water.
Then I took the box and covered it with black construction paper. I glued gold and silver beads onto it. Then I put the bottles in the box.
How it makes sound:
When I blow into the bottles, the air column vibrates and makes sound.
When there is more or less water in the bottles, the vibrating air column is shorter or longer and changes pitch.