Escape to a Blanket Fort!

I got to spend the day with my four-year old niece today. There was fingernail painting and necklace beading and pop-up books. Best of all, we built a blanket

fort across the living room. Blankets carefully arranged between the sofa and a rocking chair and a card table, with clothespins and hope holding it all together. Inside there were pillows, more blankets, books, and a hand-crank lantern. Snacks available on request.

Granted, this was not the most comfortable or spacious place to be. There was a sag in the middle and if the day had been a hot one, we would have needed to bring in a fan--likely messing everything up. 

But it was an opportunity to make a new world, or a series of worlds, with no worries about continuity or anything practical. My niece was first a baby dragon with a small horde of jewels, then she was a mommy, trying to get her children to sleep. She tried out lots of different little noises, then hid inside as people came into the room, her giggles giving her away.

When was the last time you built a blanket fort?  
When will you make your next one?
What new possibilities might unfold?