I kind of waited until late in the project to make the ghosts, hoping for some kind of inspiration.  That inspiration came in the form of a ghost I found at a CVS and can be seen the the outdoor demo video.  However, CVS only had one ghost and they were around $7 each.  Still, I was able to steal some design ideas from it to make my actual ghosts.  I picked up the small plastic skulls from somewhere for about $0.50 apiece.  For the arms, I used insulation for 3/8” copper pipes.  Inside the tube insulation I ran some shielded 12-gauge copper wire leftover from a wiring project.  This helped hold the arms in their bent position.  I hot-glued the head to the pipe insulation to hold it in place. 

Since the kids in my neighborhood start trick-or-treating during late afternoon and go until after dark, one design issue I needed to address was how to make the ghosts look good both at night and during the day.  I solved this by putting black sheer fabric on as sort of a cloak and then putting cheesecloth over top of the cloak and head, hot-gluing it strategically into place, adding some more rips to the fabrics for creepy factor, etc.. 

To hold the ghosts to the line I used black shielded copper wire.  I put a loop through a loop that conveniently was already on the top of the skull head, and another loop on the top to actually sit on the line.  Since the line needed to spin the wire couldn’t be crimped directly to the line.  Fortunately, I could just let the ghosts be driven around by the snap swivels.  The wire therefore only had to have a space crimped around the line that was big enough for the line to go through but small enough so the snap swivels wouldn’t go through them.  If you look closely at the grainy nighttime pic below you can see the snap swivels behind the ghost.

As far as keeping the ghosts pointed in the right direction, I just had to play with how the connecting wire twisted.  There was definitely some play in them and the wind affected them somewhat, but a little bit of experimentation kept them going the right way for the most part.