Plywood, spackle, paint, electrical supplies, and misc. weapons.
I made this in 2001 or 2002 for my son. He wanted a cobra headquarters, and my wife and I wanted somewhere to put his Joe toys away.
It basically just amounts to a decorated bookcase. There was room for his vehicles and figures.
I built the temple with plywood, rougly covered it in spackle, then painted it with gray primer. I hand-painted the logo on the front. Some electrical boxes were used for gun emplacements.