Cats are famous for sitting in boxes, but rabbits love boxes too. If there's a box around, regardless of the size, you can pretty much guarantee Trouble will be in it. One of my all-time favorite photos of Trouble is the one of him squeezed into an empty Kleenex box. He naps in his pear box and plays in his digging box (which formerly held copy paper and currently holds an old phone book for him to shred). Whenever we empty a box, we put it out for Trouble. Within minutes, he's in it.
This layout makes me smile. Silly rabbit.