When I was a child, I, and all of my friends, knew what we looked like last year, the year before, the year before that and so on from we were born. All families had photo albums or drawers full of prints. It's how the world was organised.
I had an interesting conversation with a seven year old a few days ago about what she looked like when she was as old as her almost three year old sister. She didn't have a clue. There are no albums, no prints. Since I never throw away photos, and since I did see her on occasions then, I do have photos of her taken at irregular intervals. I showed her one. She was very surprised, and had no recollection of the girl in the photo.
Unfortunately, this is the reality for an increasing number of people. Digital photos are taken for instant gratification. Then, as the device used is changed or lost, the photos disappear forever. Some are uploaded to online services of different kinds, but passwords are forgotten and companies go out of business, so in many cases, that's not forever either.
I find it worrying and sad.
Here's the girl at three, taken with the GH1 and Zeiss CY 85mm f/1.4: