PVC playhouse, a simple and inexpensive design your kids can use indoors or take outside for some imaginative fun.
PVC by It's Great To Be Home. This blogger posted all the plans to make this. It only takes one person and can be done in an afternoon for aprox. $60. SHe is planning to do a follow up post with the cover for the fort. I think sewing a fabric cover could be fabulous. That would keep it light weight and easy to move around if needed.