What you need:
Lay the aluminum foil over the plastic cup, shaped into a ghost-like shape.
Then take the gauze, cut into squares (size may vary according to what size of cup you are using), dip it into the laundry starch and squeeze as much of it out as you can.
Then, layer it over the aluminum foil - we used 3 layers of gauze.
Let it dry overnight.
When it dries, you can ad some scary face to your ghosts. We used permanent markers.
To us, these are more adorable than scary :-)
Happy Halloween crafting!