Where does the time go?

So, I am taking random pictures of the kids the other day.  I took this one of Lex and I was just struck. She is growing up so fast.  Becoming a young lady.  A smart, funny, beautiful young lady.
She should still look like this.  How is it possible for time to go by so quickly?  She has blossomed into such a neat kid.  

Sometimes I wish I could stop time.