Why are they growing so fast

I was just thinking about this last night! My FIL picked up my daughter and she didn't do the newborn scrunch. I wanted to cry because I missed the last time she did it 😭 I know it's a good sign developmentally but damn, why does she have to grow so fast.

So cute:)

I’m the only one who is sentimental for no longer having a newborn (and my baby just turned 2 months old) I can’t imagine crying on her first birthday