Try this: Amaze your friends and family! Suspend a ring, large paper clip, or anything of a similar weight, on a length of thread. Hold it between finger and thumb, dangling down over a surface. Tell yourself it will move in a circle, clockwise, without you moving your hand. Keep your hand still but bend your will to the task. It will begin to circle and, if you concentrate, the circle will get wider. Tell it, mentally, to stop, or change direction and it will slowly comply without you moving. You can cause it to make pendulum movements side to side or forwards and back.
I was shown this on a work-based personal development course. It was meant to convince us we were capable of anything! Once we were successful, the mechanism (below) was explained. Like anything else, the more you practise, the better you get!
This is not spirit possession or anything like that. It's sub-concious micro movements of your own muscles that you are making happen, initially without being aware of it. That's one way that the ouija board may be directed i.e. by one or more living, breathing people around the board. Couple that with the desire for something, anything to be spelled out, and the desire to connect with it and you have your 'spirit' messages. The human mind is a powerful thing.