Inspired by the tarrot cards thread.
I think I would let my children mess about with tarrot cards but I would always say no to ouija boards. Not sure why. Its the only thing I couldn't get peer pressured into as a teenager 
I'm not woo (well not really woo) but I think that ouija boards would be a 'my house my rules' situation...
yABU ouija boards aren't really going to doom you
yanbu don't mess with that!!