history: I was looking at old photographs of my son yesterday, and almost started crying. I still remember those days, and started looking at all of his old baby clothes I always hate thinking that my son is getting old. Just like a few days ago_comma_ I was looking at some of my sons old clothes_comma_ and it made me very sentimental. I never want him to get old on me.  I believe you are really sad although it's a fact of life
current: Yes. You get to see them change and grow. It makes it all worth it. 
next: True, and the good thing is that when the kids grow, they provide moral support to parents.