percussion instruments 
Group of instruments that are struck directly with the hands or with sticks, mallets, etc. to produce a sound.
Instrument consisting of wooden bars placed on top of resonators arranged in chromatic order in two rows; the bars are struck with mallets.
Metal tube whose function is to amplify sound.
Wooden slats that the player strikes with mallets.
Instrument consisting of a large metal disk with a raised central portion that is struck using a mallet.
Series of metal tubes arranged vertically in order of size; small hammers are used to strike the tops of the tubes.