Is It Really Just A Game?
Ouija boards have been around for some time, and most people believe it's just a game board.
(It was actually marketed as a game board when it was first advertised in 1891.)
There are also many sound scientific explanations for how the planchette could move across the board and point to specific letters even when none of the participants "are doing it."
The ideomotor response, for example, is the phenomenon where people make motions "unconsciously" due to the minute tremors our muscles make. When we take this into consideration along with the collective beliefs and expectations of groups of people, then coherent responses can come out of a Ouija board even when no one is consciously making it happen.
But we all know that life isn't always all explained by science. In fact, there are so many things that scientists can only theorize about but still can't understand or explain.
(Science can explain, for example, that it's our chromosomes and DNA that make up who we are. But science still cannot explain how -- when a fertilized egg starts to become a fetus -- the arms cells know that they're supposed to become arms, and the feet cells know they're supposed to become feet, and they don't all get mixed up as they become a human being.)
So along with the possibility that there are scientific explanations for the Ouija board phenomena, there is also the fact that a number of people have had paranormal experiences following their use of it.
(One of them is the true case of Robbie, which actually became the basis for the movie "The Exorcist.")
Here are some of them.