A Ouiji board is a child’s game.
Makes no difference if it creates the desire to know more about the occult in the mind of the individual, be they young or old.
I’ve been doing spirit release work for about twenty years. Not everything the father says is true. For example, “inviting” them in can be accidental or without invitation. They can enter when a person is drunk..thus the term spirits for alcohol, when a person is in depression, when they use drugs, or when they are under general anesthesia.
I’ve cleaned up many messes from people using ouija boards.
The spirits can get pretty nasty at times. Their power is often the influence they gain while the host denies their physical existance.