Our kitchen cabinets would open periodically while we would be in the living room watching TV. Sometimes you would walk in and they they were, and other times you would hear it happen. Too many times to be a coincidence.
One time I was upstairs by myself when a small rubber ball came rolling out of my son's room hard enough to hit my bedroom door and bounce into our room. I was just in there sitting and there it was. Never could explain how that happened.
Nothing scary but plenty of little stuff like that.