A cold spark machine, also known as a cold spark fountain or a cold spark generator, is a type of pyrotechnic device that produces a spark-like effect using metal particles instead of traditional pyrotechnic compounds. The sparks produced by a cold spark machine are generally cooler and less intense than those produced by traditional pyrotechnics, making them suitable for use in indoor or close-proximity settings. They are commonly used in entertainment and event production, such as music concerts, theatrical performances, and special effects.