A fire screen is something we put in front of our fireplace to keep us safe from the fire. Just like we wear helmets when we ride a bike, we need to protect ourselves from the fire too.
The fire screen is like a fence or a wall that separates us from the fire. It is made up of metal bars that are spaced out so we can still see the pretty flames, but it blocks any burning pieces of wood or hot embers from flying out and hurting us.
It is important to have a fire screen because it stops things from catching on fire outside the fireplace. It also makes sure that only clean air goes in and out of the fireplace, and that no ash or smoke comes out to make our room dirty or smelly.
So just like we need to buckle up in a car to stay safe or wear a raincoat when it's raining, we need a fire screen to stay safe from the fire while enjoying its warmth and beauty.