I don't know what normal is in regards to memory. I have DID and remember very little of most aspects of childhood but there are some random things that I recall from very young (2 or 3). I have very little memory of being in my childhood home taking part in family life at any age of childhood, but recall non-traumatic sensory impressions of my bedroom.... the light playing through the curtains, the smell of the toy box, the sounds of children playing outside. When people tell me about things that happened in childhood or adolescence (or adulthood, haha) I most often have no memory of them at all.