With the opening of Milago, the Shore, and 360 over the last year or two, a few more kids have moved into downtown condos with their parents. This is great news for downtown diversity, given that -- amazingly enough -- almost no kids lived downtown prior to the recent wave of development.In fact, the 2000 Census numbers are shocking in this regard. According to the government, 3,713 of 3,855 downtown residents (zip code 78701)in 2000 were adults 18 or over. That means that only 142 children representing 3.7% of the population lived downtown. Of this group, 46 . . .