Odd does not equal evil or demonic. Again, where is the evil in this story? I believe I have read you relate the story a time before (I could certainly be mistaken about that), and was puzzled then by its use in supporting the existence of the devil.
Evil (as in Satan) uses the Ouiji board and does indeed make predictions. It’s a ploy to distract your faith from God to lead you to put your faith into other things. That’s how it all starts. And, its an entry for evil into your life.