Cold sparks are tiny, bright, and brief fireworks that create a dazzling display without producing significant heat. These sparks are commonly used in indoor pyrotechnic displays, theatrical performances, and special events where traditional pyrotechnics are not suitable. Cold sparks are created using a special machine that combines titanium or zirconium granules with a non-flammable and non-toxic fuel, resulting in a mesmerizing effect that is safe for indoor use.