A firework is a device that produces visual and auditory effects through the combustion of chemical compounds. Typically used during celebrations, such as New Year's Eve or Independence Day, fireworks create colorful displays in the night sky. They come in various types, including aerial shells, fountains, and sparklers, each designed to produce different effects. Fireworks are made up of a shell filled with explosive materials and colorful chemicals. When ignited, the explosion propels the shell into the air, where it bursts and releases light and sound. Safety precautions are essential when using fireworks, as they can be dangerous if not handled properly.