I don't want to say much about the details because it's very outing but I've spent 3 years in a haunted house with under 5s and everything witnessed was seen by both dp & I.
We had emergency mediums out after putting up with it and reassuring each other for ages that we didn't believe.
Everything stopped that night they came out to get rid of him. And for about 5/6 months it was ok until he came back and it escalated. We have since moved house, rapidly!
I feel so sorry for anybody in this situation who owns their house as we were out and moved so quickly, although it's not a choice I'd have made if we weren't desperate.
We had gorgeous neighbors and were only metres from the school.
Advice we received was to call the emergency mediums (we went to local spiritualist church & explained situation, they gave us the number and they came back later that week), to say the Lord's Prayer each day, other people advised to put bibles & crystals under beds & sage the house.
We were scared so we did make the kids say the Lord's Prayer each night before bed, we tried to make it like a game to recite the words, we were terrified. We're not even religious. None of us are christened although that's something I'm thinking about now.
I think these situations are more common than you think, it's just hard to explain to people who haven't experienced it because you look nuts.
I regularly say to my other half "if I'd have lived in that house by myself I'd have just put myself on medication or something and questioned my mental state, but because we saw it all together at least there's that"