Hon- using a ouija board- even once- IS dabbling in the occult. Even if those who messed about with it have never touched it since- that doesn't mean that it couldn't have caused problems. It IS a form of divination. It doesn't just mean trying to see the future- it also means to uncover hidden knowledge by supernatural means- including asking a spirit entity questions, trying to 'divine' ( perceive intuitively or through some inexplicable perceptive powers ) knowledge; which is exactly what a ouija board is designed for.
It's like going past a big gate with a sign on saying 'Dangerous dogs- do not open' and saying that because I only opened that gate once and never touched it again, it wasn't possible for the dogs to have got out. There's a reason God told us to stay away from that stuff. A Christian has authority over demons- but only a fool would mess about in that realm.
God gave humans authority over the animals of the earth- we're above them, we 'rank higher' if you like and God put us in charge of them. But only an absolute idiot would go up to a hungry wild lion and yell into its face 'Hey- I'm higher than you!' and honestly believe he wouldn't get mauled!
Do you see the comparison?
If your family were genuine Christians (which, if they were, one has to wonder what the blazes they were doing playing around with a ouija board, for goodness' sake!!!), then, that was still asking for trouble. It may well be that demonic influence was invited in by that action.
I'm not saying it was- I want to be clear about that- but this is why we don't touch that stuff.
A Christian- a true Christian- can't be possessed by a demon- but we can get hassled by them and give them leeway to be a complete pain in our rear!
I've used this example before-
Imagine you're a house. You become a Christian- and the Holy Spirit moves in and lives within you. Because of that holiness, nothing unclean can live where the Holy Spirit lives. The demons can't move in- but they can sure as heck stand on your lawn and throw stones at your windows and ring your doorbell and graffiti your walls given half a chance. Playing about with stuff we shouldn't be touching can be like inviting the demonic to set up camp on our front doorstep.
In my own family, I learned that there had been some dabbling in similar stuff years before I was even conceived. I wouldn't be at all surprised if something was given a free reign on my family then- I won't go into the difficulties, weirdness and very clearly spiritual things that happened as I grew up- and when I became a Christian I basically prayed, breaking the bondage of anything that had been done by members of my family. I renounced any occult activity and pretty much did exactly what Pal Handy said. (Ok, there was no board for me to destroy but I sure as heck got rid of certain other things that I could and prayed for protection through our home- going through each room- and over my family).
I also prayed over my children while they were still unborn, that any generational curse caused by past activities out of my control, any demonic influence on my family that had been invited in through those activities would be rebuked and ended and would not have any place in our home nor any hold on my children. (We also had neighbours involved in witchcraft at one point- and there was an ongoing feud between my family and them before I was born- and I also prayed against any actions on their part towards us- any curses they may have thrown our way- even if some of that family thought it was 'a bit of fun').
The good news is that 'He who is in you is greater than he who in the world'. Brilliant, eh? Don't let all this scare you. If you're a child of God- renounce the occult activity (just doing something once still means it was done!) and rebuke any influence or hold resulting from that.
I'm really not a Christian who sees demons in every shadow. I think far too many Christians are far too quick to cry 'demon!' at every little thing- but I do know not to dabble in stuff like this- and I do know that there's a whole spiritual realm and we're in the battle- so I do take it seriously.
I am not advocating you go in all guns blazing and try to perform some sort of 'casting out' - for a start it's against the rules here to instruct someone to do that and for another it's irresponsible when I'm not exactly sure what- if anything- has been happening in your family. To be honest (please don't be offended) it's a little hard to get exactly what you're saying. Perhaps if you refrain from a slangy 'text talk' style, which isn't really the done thing in forums, it would be much easier for us to know exactly what you're saying. We know you personally haven't meddled with the board. We know that your family did it once and didn't touch it agian- but you seem to think we don't get that. I mean this kindly, because we really want to help- I think it'd be very helpful if you use normal punctuation/ spelling to express yourself and not be in such a hurry that you're dropping into confusing 'teenspeak' if you see what I mean!