A ouija board is a wooden board that contains the 26 letters of the alphabet; the numbers 0-9; and the words yes, no, maybe, and goodbye.
There are two popular theories as to how the Ouija board works. The first is the theory of many spiritualists. This theory states that spirits who have messages to give to the living communicate through the board. The second theory is the automastic theory. This theory states that the answers from the board come from the subconscious mind. Which theory is true is unknown, but it mostly depends on the beliefs of the person using the board.
Another controversy that comes up with the Ouija board is whether it is good or evil. This is another question that no one knows the answer to. It is usually a decision that is different for each individual person and that decision should be based on their moral beliefs.
If you choose to work with a Ouija board, there are a few things you should know in order to keep it safe. The first thing is to limit the experiences. It should be used in intervals, preferably no more than 1-2 hours a week. You should never work alone, but make sure your partner is someone you trust. Always be positive, you're going to attract the same kind of vibes you send out. As far as protection goes, if you are a Wicca you should cast a circle before using the Ouija board, and naturally close it afterwards. If you are Christian you might want to keep a bible or a rosary close at hand. Most importantly, if you feel anything threatening or evil say goodbye and put the board up immediately.