This happened to me when I was five or six years old (I'm now 20). It's the first experience that I have had with a HUMAN entity (or entities in this case), and only the third paranormal experience I had ever had in my life. Before you decide to comment saying that I don't know what I'm talking about or that I'm lying because you don't remember when you were five, let me say that's just you. I have an extremely acute memory from early childhood. I remember little things in detail from as far back as when I was 3 years old. So please don't leave me rude comments.
I was at school during the day, in first grade and the class had just entered the music building. Our school was not one huge building full of classrooms, but a bunch of little buildings spread out. Each little building was divided up into one or two classrooms with a bathroom in the middle (depending on the size of the building). The music building was small, so it was only one classroom without a bathroom. There was only one way in and one way out if you don't include the windows. This may not seem important right now, but it will make sense later.
We had all just sat down in the semi-circle around the teacher, and she was singing a song to us. We were on the floor and she sat on a chair in front of us. In the semi-circle, I was off to the side, farthest from the door, so I had a perfect view of it. The teacher's desk was pushed against the wall with the door on it, right in front of a window, and there was an adult-sized chair right beside the desk. The chair was probably about 9 feet away from the door. It was empty when I entered the classroom.
About halfway through class, something different caught my eye and I looked forward and saw a woman sitting in the empty chair by the teacher's desk. But really, she wasn't the weird part. She looked totally normal, solid and everything. She had light brown hair that looked like it had been braided a day before, because it was very even, but loosely curled. Her skin was lightly tanned (the typical Caucasian colour) and she looked to be about 30-35 years old. She was thin, and wore a pair of casual jeans and a light sweat-shirt. Looking back, I think the sweater was brown but I can't remember.
The weird part was that she had a child on her lap. He looked way different from her. He was still solid, but his skin was paper-white and he had dark lines under his eyes, which were closed like he was sleeping. The boy appeared to be about three or four years old and was dressed for a very cold winter. He had on snow boots, heavy pants, a coat and a winter hat on his head. The lady had him wrapped in a knitted-looking blanket. His mouth was open a little bit, and he didn't make any movement, except that the lady was rocking him.
At the time, I knew that she wasn't a teacher (because of the way she was dressed) and that he wasn't a student here, but I didn't think anything else of it. I was just a little girl and didn't put two and two together. But I still remember it like it was yesterday, and reflecting on the details I now know that neither of them were on this plane any longer. The teacher didn't look at or speak to the woman and none of the kids noticed her. The classroom doors in this school were very heavy and loud when they opened and closed, so if she would have come in through the door I would have seen her, and everyone else would have heard her. That wasn't the case. I know for a fact she didn't come through the door.
She was just sitting quietly, rocking the little boy forward and backward. She didn't look happy or sad, her face was totally blank. It appeared that she was looking at me, but she wasn't. She was looking through me. I don't think that she noticed any of us in that room with her, just like most of the people in the room didn't notice her in the room with them. She wasn't out of view to the teacher and the half of the class that didn't have their back to her. They would have seen her, but didn't. She sat there the entire time that I was in class. When we left to go back to the first grade building, she was still right there in that chair. This happened two times during the school year, both on very warm days, because I remember I was dressed for summer both days.
I still to this day have no idea who she was or why she was there. I don't know why the little boy was dressed so heavily, especially on a hot day. My town is in southern Nevada. It doesn't get that cold here during winter. Nothing would make dressing that heavily valid, even in the winters. We get maybe one day of snow if we are lucky. I'm still at a loss for meaning here. Why would they be at my school? There's no way the little boy could have been a student there, ever. He was too young.