LFS:
Brief Grammar lesson-
“They’re” is used as a shorter version of “they are.”
“Their” is used when talking about something they own are something like that.
For example:
They’re obviously bored! They’re tapping their feet, curling their peyos, and their eyes are roaming through the room.
(Lol that last part about their eyes roaming brought to mind an image of a pair of eyeballs strolling throughout the room.)