Constructing a Fort.

Today I was set the mission to build a fort over the weekend in my front room, which was a pretty awesome idea. So now, after a few vodkas, I have decided that it is time to try and decide how to build it. The initial problem is that I don't have removable cushions on my sofa, which means that I have to fashion a fort out of blankets and boxes. And I only have two small boxes. hmm. suggesions please.