The name of my instrument is "The Blue Machine." It is in the percussion and string instrument families.
My instrument is made out of a tissue box, 2 cups, wax paper, tape, hot glue, construction paper, beans and rice, and 5 different sizes of rubber bands.
The strings vibrate to produce sound and the pitch changes by the size of the rubber bands.
Sound is also produced when you tap the wax paper on the top of the cup, causing the rice or beans inside the cup to vibrate.