I saw a craft where layers of cheesecloth were dipped in liquid starch and then draped over a detergent bottle that had a pipecleaner wound around the neck to make raised arms. The bump over the lid becomes the ghosts head, the raised arms lift the cheesecloth for ghostly arms and the cloth was left to puddle which makes a base. When it all hardens the ghost can stand on its own, its see through and very ghostly. They added black shapes for eyes and mouth. I used the ghost for several years before it eventually collapsed.