It is when I look at my kids through their grandmother's eyes, is when I realize how much they have grown in the past year. Not just in height, but in skills, maturity, and sheer grown-upness. The younger one is doing now what the older one was doing a year back. And the older one has picked up things nobody ever suspected he would. They have both come into their own, and established themselves as individuals.
But, one year is a long time. Specially considering that birds evolve from egg to (nearly) full-grown bird in just slightly over a week.