There is something so universally appealing about forts for kids. I think Columbia architecture professor Janet Foster summed it up well in todays New York Times article The Walls Came Tumbling Down when she said " Little kids don't have permanent control over their spaces. They can make a little space. It's about having their space, taking control of it. Fundamentally, that's what architecture is all about."
I love these pictures from photographer Mark Lund's series"Living Room Fort" capturing kids at play in their own little worlds.