Has Anyone Seen my Baby?

I went out today to bring Zachary and Keona to swimming lessons and came home to a big boy. Timothy has decided that he needs to crawl now, especially to paper. It's the cutest thing going. Not only that but my baby has decided that since one of the daycare kids can pull herself up with furniture so can he. He pulled himself up and stood there and looked at me smiling. Why on earth does my baby have to grow so fast?