Things You'll Need
Instructions
Cut the 2-by-6 board into three sections: two measuring 1.5 foot long and one measuring 1 foot long. Lay the 1-foot long section on its 6-inch face so it only stands two inches tall. Orient the other two sections of wood in the shape of the letter "I," standing them so that they stand 6 inches tall.
Use two nails at either end to connect the two boards to either end of the center board. Hammer the nail through the tallest pieces to connect them to the center board.
Lay the section of cardboard over the two end pieces, suspending it between the 6-inch tall sections. Tape the cardboard at either end to secure it to the wood by wrapping the tape around the perimeter of the wood to prevent the cardboard from slipping.
Use a section of duct tape to connect the middle section of the cardboard to the center section of wood underneath it. Pull the cardboard down to the wood with the tape, then fasten it by wrapping the tape around the back of the wood.