So you have an old sweater sitting at the back of your closet. You snagged it while goofing around with your cousins and thought it would never see the light of day. You've been meaning to have it fixed, but it seems beyond repair. Recycle it into a cobweb dress you can use for Halloween!
Use tweezers and scissors to do a bit more unraveling and you're good to go! Wear it over a tank top and tights. You can even accessorize it with spider or insect accessories for a better effect!