The house I lived in when I was 3 years old had some strange things happen in it- most of the bedroom doors were heavy wooden sliding doors, i.e. no way they'd move without someone pushing on them hard. I could barely even open them at my age. I'd be napping in my bedroom and the big wooden door would slide open and shut. This happened on a daily basis in both my room and the other bedrooms. Things would also move around the house. My mom found a head of broccoli moved from the fridge to behind the couch in the living room once while she was cleaning.
The house my parents own now has only had one other set of residents, the old man and woman who built it. The portion of the house they built (it's since been added on to, and you can see the difference in the brick tone from the old part of the house to the new) is over 100 years old, and they lived there for about 50 of those years. The people who bought it from them built the rest of the house but never lived there. It sat empty because it's gigantic and very hard to keep heated.
Anyway, the side door of the house that leads into the kitchen/dining room has a small window in it. Every member of my family has seen, out of the corner of their eye, the old woman walk by the window on the outside of the house. What was funny was, my boyfriend came to stay with me for a bit over Christmas break this last year and we were sitting at the dining table. He all of a sudden said "Hey who's outside?" I asked him why he asked me that and he said he thought he just saw someone walk by the door. I didn't have the heart to tell him until after he left my house to go back to his