The thing that gets me about how my kids are growing up is not their birthdays, it's the start of the school year.
This year, Ten will be in fifth grade. Here, fifth grade is the last year of elementary school. Six will be in first grade and in school all day.
My babies are growing up. It makes me appreciate them for this time in their lives all the more and a little bit sad. I know they're excited and that's great, but it will be a little while before my excitement catches up with theirs.