Made with pvc and the letters are made from 1" pink foam glued on 1/4" plywood so they would be strong enough to screw to the pvc pipe from the back side. It is 3 pieces the top and both sides for easy storage. Not pictured: 2 foam skulls to the middle opening one on each side leg.
These designs utilize tubes and cut-outs as the bases and structures of these products which links into a strong structure to put weight on. I like these designs because they look comfortable to sit on, and look simple in its assembly.