I remember quite a bit from childhood, I'm 50 now if that matters. I remember a handful of events that happened prior to age 3, we moved that year so they are house specific. Oddly, I have a few years before I was ten that I remember very little. I have glimpses of a couple of school events for first grade and that's it. I don't know of any real trauma that would have blocked it, just an odd blip.
My mom is 80 and remembers things from my childhood that I don't. I have no doubt they're true, because when we discuss them it jogs my memory.