I love this easy, creative idea to decorate an unused fireplace for Halloween. Purchase enough pumpkins in various sizes to stack inside your firebox. Be sure to get white as well as orange pumpkins. Use black and orange paint to decorate some of the pumpkins with polka dots or stripes. With no carving, the pumpkins will last longer and there's no mess. Add a few candles on the mantel and you have a fun, festive display!