Ok, this is what I am going to build. I would like to have a computer-generated skull in the crystal ball, but don't want to buy an LCD projector. So, all I need is a crystal ball with one flat edge that will be pushed up against the fortune teller's rib cage (I can hide a small monitor there). The problem is the crystal ball. I bought a 10" gazing ball and removed the metal. Now I need to cut out a circle from the ball and glue on a glass plate. The problem is, any glass blower I have talked to have told me that it would be very difficult to cut out that circle. I have a Dremel tool, but Dremel says not to try to cut glass with it. The glass is very thin so I might try it. Or, I might try puting a flaming alcohol-soaked string on it then do a water dunk. I have never worked with glass and the balls are $15 each so I'm not into experimentation. Then I have to figure out a good way to glue on the glass plate since I want to fill the finished product with water (thus, I need a strong, water-tight seal). Glad I am starting early this year.