What is slide whistle?

A slide whistle is a musical instrument that produces sound by sliding a piston back and forth within a tubular body. It typically has a simple design, consisting of a long, narrow tube and a sliding mechanism that alters the pitch as the player moves the piston. This allows for a smooth glide between notes, creating a characteristic sound often associated with comedic or whimsical effects in music and sound design. Slide whistles are commonly used in children's music, Cartoons, and theatrical performances.