I know it too - I warned my children to stay away and luckily they listened to me. Growing up we tried it once and the board made a wierd but harmless prediction about the closet light bulb blowing out - which it did shortly after. My mother- who is Christian but who normally has no use for occult phenomenon - immediately threw the board out.
Those are real and very creepy.
Just now read your response and your home page.
God bless you and your family.