....while we're on the Ouija topic, like Ghostlady, I always had the impression that any spirits coming through were using human intervention (hands) to move the planchette, unlike other transcommunication tools like an EMF detector, or other device.
I was in a group where others were using a Ouija, and the board was actually placed on the floor in an interior hallway. They were getting hands free planc movement, but nothing substantial. Could feel a noticeable temerature drop in the room. Someone else in the group saw it moving before anyone sat down at it.
So much for that theory
