You find yourself waking up in a white area void of life. You walk around for a few minutes but find nothing. You think of a way out, and a door appears. It leads back to the real world. You decide to explore a bit and think of some other objects. This place is your pocket dimension now. The door to enter and exit is the closet door in your house no one in your family uses, as they assume the room is empty. You can take the items you've spawned in to the real world and vise versa. Have fun!