A musical instrument (such as a flute, horn, or organ) that is played by blowing air through it. Percussion instruments include any instrument that makes a sound when it is hit, shaken, or scraped

String instrument is a musical instrument with a set of strings that vibrate to produce sound when they are pulled, hit, or rubbed with a bow:
Guitars, pianos, and cellos are different types of string instrument.

Wind instrument : a musical instrument (such as a flute, horn, or organ) that is played by blowing air through it.

Percussion instruments include any instrument that makes a sound when it is hit, shaken, or scraped.