2. The water cup xylophone (1-PS4-1)
Needs cups, water to fill them to different levels, something to tap them with. Threes: a Tapper, a Pourer, and a Recorder at every set of cups.
Cups filled with different amounts of water get tapped with a pencil, and each one rings a different note. It’s the same standard as the rubber band guitar, sound from vibration, and first graders can hear the note change when the water changes. As usually run, though, it’s a demo, with one set of cups at the front and one adult doing the tapping.
The fix
- Run it after the guitar, while vibration is still fresh.
- Put a Tapper, a Pourer, and a Recorder at every set of cups.
- The Pourer changes one cup’s water, the Tapper plays it, and the Recorder marks whether the note went higher or lower.
No page for this one; the three roles are the whole fix.




