Theatrical scenery is like a giant picture that helps tell a story. Imagine you're playing pretend with your friends and you want to create a make-believe world. You might use a blanket to create a fort, or pillows to make mountains, or even toys to create a castle. Theatrical scenery is like that, but on a much bigger scale!
When grown-ups write plays or musicals, they need to think about what the story looks like. They have to decide what kind of world the characters are in and what everything looks like. They might want a forest or a castle or a beach or even space!
To create these worlds, the grown-ups use things like backdrops, which are like big curtains with pictures painted on them. They also use pieces of wood called flats that can be decorated with paint or fabric to look like walls or trees or anything else!
Sometimes, they even use real furniture and props to make it look like the characters are in a different world. Imagine if you were playing a pretend game about a pirate ship. You might use a cardboard box as the ship, a broomstick as the mast, and a hat as the captain's hat. The grown-ups in charge of theatrical scenery do the same thing, but they use real and much bigger versions of those things!
Once everything is set up, the actors come onto the stage and perform. The theatrical scenery helps them and the audience feel like they're really in the make-believe world of the story. It's magical!