Growing up

Leanna's all excited because Timothy was sitting up a little bit today. So I started talking to her about all the things that Justin has learned to do and all the stuff that she can do. She asked me, Mommy, can I grow up today and be all grown up? I said, no, it takes a long time to grow up. She said, you mean days and days and days?
Sometimes it seems like it's happening that quickly.