oh yeeeahhh. cats and paper/cardboard...
i used to build little houses out of cardboard boxes and hot glue for my cats to play in. some were pretty big (like the ones i used from big floor speaker boxes that were about 4.5' tall).
though you do have to watch out sometimes. i had a few paper bags with the handles out the night before christmas eve to pack up presents for relatives to bring to my parents' house. my chubby black cat was playing around them and i was doing whatever i was doing. all of a sudden she was in a panic, darting around the room with a bag attached to her. she'd gotten her head through one of the handles. she tried darting under a chair and then realized that wasn't working... i made a grab for her but missed as she darted away from the chair and up the half flight of stairs to the kitchen, bag in tow. she ran under a baking rack we have and must have torn part of the bag on that. before i was able to get to the stairs, she was back down with the handle and part of the bag around her neck, looking like a little ghetto superman cape. she got behind a chair and stopped. so i just calmly talked to her and moved over to her and started petting her and then slipped the handle off her.
a much funnier story about a box and two cats...
so, i had a box top on the floor in an apartment i lived in with three cats (one of which i still have - the tortie). the other two cats were in a battle over who was going to sit in this upturned box lid (for green bar printing paper). the male siamese had it for a while, but persistance and rage let the female maine coon take over after some time.
the siamese was not happy, but obvioulsy had a plan.
i was at my nearby computer desk, and only looked over because of the ominous quiet that chilled the room behind me. i saw the maine coon... "miki", laying tin the box, tail flipping slowly, as if to say, "dang straigt its my box - back off geek boy". she was watching him too. giving him a bit of the side eye.
the boy, "leo", eyed her back. measuring her up. he only outweighed her by mere ounces, and they were both strong cats. but where miki had tenacity and riteous anger on her side, leo... well, he had a plan.
he kept her gaze for a minute or so. then slowly, as if he really was losing interest, looked off to the side and up a wall. miki fell for it. she followed his gaze. and at once, without even looking back first, dove paws first into the box, under miki and lifted her right out of the box as she twirled to maintain some sort of balance and dignity. leo had regained the box with the oldest trick in the book [hey, what's that? points at shirt - victim looks down - finger flick to the nose].
miki skulked off, planning her revenge...