Fireworks are a really cool way to make a big, colorful display in the sky at night! They're made up of lots of little packages called "pyrotechnic devices" that light up and make loud sounds when they go off.
Fireworks are usually set off by a person who has been trained to do it safely. They are lit with a special kind of fire called a "flare," which is like a super-strong match that can ignite the fireworks from a safe distance.
Once the fireworks are lit, they shoot up into the sky and explode! The explosion creates lots of small "stars" that fly out in every direction. These stars are made up of different kinds of chemicals that give off different colors when they burn.
Some fireworks also make interesting sounds, like whistles or crackles. These sounds are made by adding special ingredients to the fireworks that create different effects.
It's important to remember that fireworks can be dangerous if you don't use them correctly. That's why it's always best to leave it to the professionals, and watch from a safe distance!