The frame imaged below came as a cardboard box stiffener for a patio furniture set. It was just too interesting to trash. The metal tubular struts just push into the plastic corner pieces.
Thinking about replacing the bent strut and maybe increasing its size through new longer struts to become the frame for a shelter to to put around my scope when camping, like at Stellafane. Just use a tarp and bungies to make the skin, maybe tent stakes to hold it down.
Has anyone done something similar?