I like Ouija Boards...I think they really work. I hate it when your friend is moving it...
My friends and I made one in 6th grade once. They kept asking how old we'll be when we die (from what I've read, you aren't suppose to). Then when I was at home I felt like I was being watched, it was really creepy. I had to leave class for speech (I had trouble with sh, th and ch words, lol). When I came back to class, one of the 7th graders had torn it in half and thrown it away. I don't know it anyone said Goodbye before she did that.
One or two of my friends didn't touch it, they just watched.
Then like, a week later or something we were talking about it and this dude heard us and said we were being watched by demons and he told us to never use them again, lol.
I've used the online one, I don't think that one really works.
Oh, and in 7th grade when we had free time in our computer class, I would search things and go to sites talking about Ouija Boards. It seemed like someone was kicking the computer desk since my row kept making noise. I was the only one in my row...so I got creeped out.
I also did a research project on Ouija Boards in that class, this is one of the sites I went to:
http://paranormal.about.com/cs/ouijaboards/ht/use_ouija.htm
I went to the online one once during class, these two dudes saw and they were like,"Oh my god! Look!" Then they asked it when the world was going to end, it said,"Spring" then the dudes started like, running in circles and freaked everyone else out. It was funny.