A really TRUE Christian would give a tract about Satan or the demons, or at least a quick sermon about how much God hates what they are doing.
No, a really true Christian...as opposed to a JW Christian...would know perfectly well that this is children having fun. They would not pretend to themselves or anyone else that it is demonic, in the sense that it came from the devil and is opposed to God, becqause, anyway, a really true Christian would put everythng into the hands of Jesus and proceed accordingly, being nice to the children and going along with the game, knowing that that is all it is.
A really true Christian would get things in proportion, remembering that Jesus loved the little children. Not like the Jehovah's Witnesses, where elders can make all the right noises as they "conduct" a Watchtower reading the latest propaganda from the GB, and then, afterwards, bully a three year old who has got down out of his seat.
It happens. I've seen it. It is nothing to do with being a Christian.