A xylophone is a percussive instrument that produces different tones when different lengths of wooden bars are struck using a mallet. It is a common part of orchestras and marching bands, and though professional xylophones are expensive instruments, you can make your own simple xylophone out of glass. A glass xylophone allows you to experiment with tone and rhythm without spending a lot of money.
Scrub out six identical glass bottles using a nylon brush. If they are not identical, they should be as close together in size as possible. Glass tumblers and glass jars are good choices for a glass xylophone.
Set the glass containers in a row on a table, with two inches between each one.
Fill each glass container with a different amount of water, with the smallest amount to the right and the largest amount to the left.
Tap each glass lightly with the side of a metal spoon. Note that as you go from right to left, the tones get progressively lower. Play the xylophone by tapping the glasses with the spoon.
Add drops of food coloring to each glass container to color the water.
Add more glasses with different amounts of water to get a richer tone.