Utilize inexpensive materials like trash bags, construction paper, and old clothes to create decorations like giant spiders, hanging ghosts, and scarecrows. Filling trash bags with leaves or crumpled paper can create the body of a giant spider, with pipe insulation or stuffed black stockings as legs. Old clothes can be stuffed with straw or newspaper to make a scarecrow, and white fabric or sheets can be draped over balloons or balls to create floating ghosts.