To make your own ghost you'll need the following items:
Take your sheet or material and fold it diagonally so that it forms a triangle type shape. Don't worry if your material doesn't line up exactly.
Place your dowel with the head inside the fabric and place an elastic around the the base of the dowel just below the head
Add eyes, mouth or whatever facial feature you would like. I just did the eyes. For added effect I tied a bow around the neck.
Place the dowels into the ground and tie the long ends (hands) together. Wala, you have a cute ghost circle.
If you decide you don't like the circle you could always just do a line of ghost and place them along the sidewalk or entrance way of your house. The possibilities are endless.