I thing to way to start. 1. One person wish go on Halloween as mummy. A other person like wish and help person to become one.
2. will that other person persuade the first go as mummy for Halloween. The first let do it to her.
For me it would fun if the person how became mummy, after wrapping noticed the can`t move and than other tell that this was her plan. If the stay that home or not is your chose. If not mummy can put open box that had shape of the under part old egyptian coffin.
Andrew