When I was a little kid I went to a friend's birthday party and some of the girls at the party started playing with the ouija board. I've always been fascinated with stuff like that but at the same time, my curiosity was tempered by a healthy dose of fear
I couldn't help but watch the procedure but was unwilling to participate myself. I also remember thinking that the girl who introduced the game to the party was moving the piece because she right off the bat claimed that she was in contact with her grandma, who had a special signal for her every time she "signed on."
Another clue that this girl was moving it herself was that I had just met her that day so she didn't know how to spell my name, which sounds one way but is spelt slightly differently from how it sounds. Of course, being the only one who refused to try it out, even though I was dying of curiosity, she "asks" the ouija board who it wants to talk to next and then proceeds to spell out my name - incorrectly of course.
I went home that night feeling somewhat disappointed that this girl had dispelled the magic by making such an obvious oversight. Of course, the "spirit" could have also misspelled my name, I suppose.
At the same time, I'm not entirely opposed to the idea that something other worldly could be at work in the case of ouija boards, and because most stories tend to relate experiences with lower level beings or tricksters, I am happy I decided not to try it out.
But that's my ouija board story.