Our stairway has six picture frames, as does my office shelf. Each year in the fall, there's a ritual - open up the back of each picture and put in the new school picture for the year. It is a nostalgic moment as each picture frame holds all the previous years' photos. As time goes on, it can be quite a struggle to close the back of the frame again.
It started with one frame, when my oldest had his first school pictures taken. It built up to six picture changes for the years when they were all in school. Then there's senior year in high school... Time freezes for four years until the college yearbook picture (or longer if said son doesn't believe in such things).
The frame for my oldest son contains the picture from his college graduation day, walking down the steps with his diploma in hand. The next three have been frozen in time as high school seniors as they are still in college or working.
Today my fifth son's senior picture went up on the wall. We went through each of the pictures in the back - a frame by frame documentary of his metamorphisis from day care to almost eighteen year old man.
I likely won't see Tom's grade school pictures again for at least four years. Next fall, we'll only go through Rory's pictures. And the year after that, this moment repeats with Rory.
The fall after that... I have to believe I'll just open up all those pictures and remember anyway.