The Bunk Bed
When I was 4 we moved into a large old town house. Every summer we would go on holiday and one of my many cousins would look after the house. Go in on an afternoon, turn on the lights, close the curtains etc
Sometimes when they would go out partying, they would stay at ours because it was walking distance from town. 1st cousin said never again, they said someone watching them when they woke up during the night and left. Then the 2nd cousin said something similar, then the 3rd said they saw someone fall from the ceiling and land on top of them... slowly each family member refused to stay over. We even had neighbours say they would see someone walking around our house and were wondering why we would not answer.
I never saw anyone but I swear I used to always hear someone in the loft coming down the creaky old ladders , or someone coming upstairs. We eventually moved when I was 17.
My parents finally said "Yeah we used to see & hear things all of the time" lol