The Carnival

Y/N was a fairly regular person. Lived in a nice house with her Mom and her younger sister, Amber... Though one day, Amber woke her up, saying her mom had said Y/N would take her to the carnival in town....

Y/N, not being the type of person to argue with her parent, simply said "Fine", just to get it over with. She found out her mother wasn't feeling well, her sister had an imaginary friend, and she was apparently stuck in the middle of it!

Once they get to the carnival, they spot a Black and white striped tent, which Amber begs her to go to. Y/N allows it, since this trip was all for her sister...

But what's inside?