Ouija boards?

Dunno if this is controversial "enough" to be here but just wondering- what do you guys all think about Ouija boards? Do they work? Is there any science behind it? Do you have any personal experiences with them to share?
Personally I'm very hesitant to believe they work at all, I like to think logically for the most part, but with so many horror stories out there it's hard to not have doubts about it lol.
Share your thoughts about it!