Voice vibration

The first is that vibrations make voice.

Like when there is salt on a drum and drum is producing sound the salt will dance.

Then the second is that level of water can also produce voice.

If you will pour water in 5/6 glasses and put colours it will become piano.

Let's see the videos of both of our activities.

https://youtu.be/hoy-6i7ddh8

https://youtu.be/j9IvcwZFx9s