Isn't it funny how ghosts rear their heads at this time of year? They seem almost charming at first, but when darkness falls, those innocent expressions are a bit more menacing.
To make a floating ghost, snap one or two green eight-hour light sticks so they glow, and insert them into a white balloon; inflate balloon, and tie closed. Use a black marker to draw the ghost's ghastly visage. Repeat to make his friends. Then hang ghosts with transparent tape, and lower the lights.