For a moment, it seemed like a perfectly rational and normal thing to want to do. Then I remembered that men of my age do not, in fact, sit in random boxes on a whim. That's a bit disappointing, if I'm totally honest.
There was a time in my life when it would have been perfectly acceptable to sit in and play with boxes. I did it quite a lot, actually. There was nothing better, when I was about seven or eight, than to find a whopping big box and then just play with it for hours.