i used to build dens too, I love making my own home, I move quite a lot because of my partners job so have to remake a home quite often, one day I would like a permanent base. I used to imagine myself leaving home and pretend I was, in order to have my own place, I used to get a stick and tie a handkerchief to the end with things in, you know, the essentials, a book, some toys, maybe some clothes, some crisp, ha ha :)