I remember Lily smiling (at me not just when she tooted) for the first time when she was about 3 weeks old. So when Cruz turned 3 weeks, then 4 and then 5 and had not yet cracked a smile I started to get a little worried. So then finally at 7 weeks old he decides to crack a little half smile and actually it still wasn't at me it was for Lily. I like to think that he is to busy contemplating the world around him to be all smiles just yet. I also learned my first mistake and that is not to compare my children and there milestones. They are two very different little beings.