Is a washboard musical instrument?

Yes, a washboard is a musical instrument. It is a corrugated metal or wooden board that is used to create a rhythmic scraping sound. The washboard is often used in blues, folk, and country music, and it is typically played by holding the board in one hand and using a metal thimble, spoon, or other object to scrape the surface of the board. The sound of the washboard is created by the vibrations that are produced when the object scrapes the corrugations of the board.