Here are great directions on how to become a Spider or a butterfly just by using things you'll find around the house.
Instructions Make the spider legs.
Use fiberfill to stuff each nylon leg so that legs measure from center of sweatshirt back to end of sleeve. Tie one pair of legs together in a knot. Cut excess nylon. Repeat same technique for each pair of legs. Using safety pins or sewing needle and thread, attach knot on legs on back of sweatshirt.