This animated "haunted" Ouija board was made as a Halloween prop. This was made with mainly junk materials from my garage, but if you have none of the parts you should be able to source them reasonably cheaply enough. You need handy-man skills, some electronic know-how, and be able to program a microcontroller or pic (or know someone who can do it for you!)Update Alert
The board can now say messages sent to it via a serial device - step 12 covers the changes I made!
This is part build-log, part how to. I hope I give you enough info to inspire you to make something similar.
Here is a video of the completed board with the lid off:
And here is a video of the completed box I had ready for Halloween 2007:New Video
This new clip shows the serial communications link working: