I have wanted to post this story for some time. It happened when I was about 12 years old, so my young age may account for a lack of rational thinking just when it was needed!
I and a friend of mine, a year older than I, began playing with a Ouija board, after school, in the unfinished basement of her large home (built 1920-30s).
It was about the second or third week of our Ouija time together that we asked the identity of the person who was answering our questions.
The reply was that it was twins–a brother and sister, from India. They had some sort of association with the Taj Mahal, they said–in my memory of it, they said they had been buried there. (I have not tried to confirm that a brother/sister set of twins were buried in the Taj Mahal–I know that it was built for a beloved wife of a king, or "rajah.")
We asked the spirits, "where are you?" They answered, "In the lights above you." We looked up at the twin-bulb light fixture above us–it didn't have a covering, just two bare bulbs. My friend and I agreed that we needed to ask for "proof" that they were there. The lights were off (we had light from a basement window). I said to my friend: "let's ask them to turn the lights on!" She agreed; I posed the request to the Ouija board: "if you are real, turn both bulbs on." Instantly, the light, in both bulbs, turned on. We freaked out.
We were in an unfinished room, and the light switch was outside the doorway. The walls were open with just the studs between rooms. We called out and got up to see if any of her sisters or brothers (she had a large family) had overheard us and had switched on the lights and run away, but no one was downstairs. (Even had someone done so, we would have seen them).
We then sat down at the Oujia board again, shaking . . . and asked the "twins" to turn off the light. The two bulbs turned off immediately.
I never again went to her house to play with the ouija board.