Welcome to the Carnivale Ignota!
The attic is usually dark at this time of night, the one bare bulb that usually illuminates it long gone cold. However, one of the boxes--which seems to have tipped on its side at some point--is casting a soft silvery light on the walls.
If you walk towards it, you'd find the room around you growing larger and larger until even the box itself is taller than you. Soft music and the sound of distant voices chattering emanates from it, and the sounds only grow louder when one of the flaps is pushed aside.
The man who emerges from it has a wide, friendly smile. His hair is brown, shaggy, and just below his chin in length, but his beard is well kept. His outfit is akin to that of a circus ringmaster, though the cheap costume cape and magician's top hat he's wearing seem slightly out of place with the rest of the ensemble. If you look closely at the inside of the cape, it seems to be made out of an instruction manual. He bows in greeting. "Hello there! I am the magnificent Kitt Kazam, the ringmaster of the Carnivale Ignota. It's been quite some time since we've last had guests to perform for, and we would love it if you would join us at least for the night.
He pulls the cardboard flap fully aside, revealing a portal of swirling silvery mist. Will you enter?