I don't see any reason not to. Ouija boards like tarot cards are just parlor games and not to be taken seriously. Ouija boards are about as accurate as tarot cards which is to say not at all. Ouija boards, tarot cards, pendulums etc. are merely a reflection of the subconscious user's desires and feelings and guesses. There is nothing magical about any of it nor are you bringing the psychic out in you by using them. There is no divine power in some other realm communicating to you through these parlor games. That's just marketing gimmick they use to get you to buy it and play it with your friends.