This spider costume is too cute to be afraid of. The legs are super easy to make and cost just a few dollars with items from a dollar store. Wear the spider legs with black clothes, add a set of antennae and you're all set for trick-or-treating.
Place the back piece on the foam board and trace around the outer rim with a marker. Use a utility knife or scissors to cut out the circular shape. The circle should rest on the outer edge of the back piece, not inside it. Set the foam board aside. Paint both sides of the back piece and allow it to fully dry.