How about linking Astrology in the mix? Putting the star constellations out and about and all throughout ........ just a thought. If not you could base it off just another world-scape such as Alice in wonderland type background or a mixture of many. I myself like the idea of a totally dark room where, before hand, many go in with punctured glow sticks on strings and spin them by hand releasing the contents inside the room creating a galaxy affect...............