IN
I going to Baranquilla in the carnavals.
The clothes are in the closet.
She is in the house.
Get in the car.
My phone is in my bag.
ON
The pen is on the table.
The pillow is on my bed.
He’s sitting on the rug.
The lamp is on the desk.
She’s on the roller coaster.
AT
He is at McDonalds.
He's at practice football.
She's at her guitar lesson.
He's at the supermarket.
We's at the baseball game.