Place two of the "L" brackets on either end of a 96-inch piece of PVC pipe so that the open side of the bracket faces down. Place a piece of 16-inch PVC pipe in each of the open ends of the "L" brackets.
Place a "T" bracket on the exposed ends of the 16-inch PVC pipe so there is an open end pointing toward the floor and the other open end pointing away from the frame. Place a piece of 54-inch PVC pipe in each of the brackets pointing down and a piece of 36-inch PVC in the openings pointing away from the frame.
Place an "L" bracket on the open ends of the 36-inch PVC pipe so that the open ends point down. Place a piece of 1-inch long PVC pipe on the open ends of the "L" brackets.
Place a "T" bracket on the open ends of the 1-inch PVC pipe to connect it to the "L" brackets on the end of the 36-inch piece. Position the "T" brackets so one open end is pointed toward the center with the other end pointed down.
Place the remaining two pieces of 54-inch PVC pipe into the downward facing "T" brackets. Place the remaining piece of 36-inch piece in the "T" bracket openings pointed toward the center to create a cross beam.
Cover the front of the puppet theater with cloth to hide the actors from the audience.