Tradition

When Arlo was a baby my father-in-law, Jim, found a photograph I had taken of Sam when he was about a week old (you can see it in Sam's hand). He suggested we take a photo of Sam holding his one week photo and Arlo at one week, together (see image at bottom).
Naturally, as a week drew near, Matt and I wanted to follow tradition and here you have it.

My three sons at one week of age,
2 years and 3 months of age and
4 years and 11 months of age.

Sam at 2 years and 7 months of age and Arlo at around one week.