The Waterphone:
Gianna noticed, "If you hit the bottle with the most water it makes a deeper sound."
"The lower the water, the higher the pitch," said Elliott.
The Xylophone:
Rakai heard when Hannah hit the shortest tube it made the highest sound.
The Kalimba:
"The longest stick made the deepest sound," said Matthew.
He also noticed that the shortest one made the highest pitch.
The String Beam:
"When you move the cup up the pitch is higher," said Bailey.
Kaylee said, "if you pull the string up at the top it makes a high sound. When you tap it at the bottom, it makes a very low sound."
