I remember when I learned to walk (man, the chairs were as tall as me). I know the exact place were it happened. Actually, I could not walk but "run" a few steps before somebody had to grab me and prevent me from falling.
I also might remember having laid in a children's push chair but I am not 100% sure about this memory.
Here is a case, I left Poland when I was four. Went back in my twenties and met an old neighbor kid now all grown-up. There I saw a wall and I told him how I remembered I had eaten a bug there and grossed-out a bunch of the kids. He was astonished that I remembered it, he remembered it too cause he was in grade school at the time and it was really gross to him what I had done. I asked my family later and they had no idea I had done that.
It is very unlikely since I left the country. Possibly some family heard from a kid or parent of kid, but they would would have mentioned it to me when I was still four before I left. Maybe my parents heard, but neither of my parents knew about this when I asked later. So they might have forgotten and if they had said anything it would have been when I was still young. Also I did meet that same kid when I was in 5th grade. But by that age I think one of us would have remembered it that we had talked about it when I was in fifth grade that time we met in our twenties when I brought it up. My hunch is that there can be some strong memories remembered from youth, some people may have more, some less, even none.
I also might remember having laid in a children's push chair but I am not 100% sure about this memory.