Fireworks are a class of explosive

Explosive material

An explosive material, also called an explosive, is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure...

 pyrotechnic

Pyrotechnics

Pyrotechnics is the science of using materials capable of undergoing self-contained and self-sustained exothermic chemical reactions for the production of heat, light, gas, smoke and/or sound...

 devices used for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display. A fireworks event (also called a fireworks show or pyrotechnics

Pyrotechnics

Pyrotechnics is the science of using materials capable of undergoing self-contained and self-sustained exothermic chemical reactions for the production of heat, light, gas, smoke and/or sound...

) is a display of the effects produced by firework devices. Fireworks competitions are also regularly held at a number of places.
Fireworks (devices) take many forms to produce the four primary effects: noise, light, smoke, and floating materials (confetti

Confetti

Confetti is a multitude of pieces of paper, mylar or metallic material which is usually thrown at parades and celebrations, especially weddings . Confetti is made in a variety of colors, and commercially available confetti is available in imaginative shapes...

 for example).