Materials: cardboard, duct tape/hot glue, scissors, measuring tape, Xacto knife, pen/pencil, pull chain, paint (optional).
Step 1: Measure and Cut Hat
Measure the circumference of your head, add a couple of inches, and use the measurement as the length of the rectangle of cardboard you use. The width is how high you want the hat to be. Mark the cardboard with these dimensions and cut the piece out.