The earliest memory I remember would probably have to be when I was the age of three and in pre-k. I remember it being called Jack and Jill. I also remember what the room looked like. I remember there being a mirror we could wash, fake teeth that can be brushed, and I think an old Apple computer. I don't know why I remember this place rather than my own bedroom in the house I lived when I was that age. Looking back I defenitely changed a bit over the years as back then I was uncontrollably hyper.
You probably remember that location more because you spent almost everyday in that room and actually interacted with aspects of it. I think it's interesting that your memory is less of an event and more of a location.