This report provides a detailed picture of how youth aged 12 to 20 in three American neighborhoods--Austin (Texas), St. Petersburg (Florida), and Savannah (Georgia)--spend their nonschool time and the amount and level of the basic "vitamins" of support from adults and institutions that they receive. The three neighborhoods are the intensive research sites of Public/Private Ventures' Community Change for Youth Development initiative. These three neighborhoods are not the poorest of American neighborhoods, but they also do not have the assets of a "normal" middle class community. The encouraging news from these three studies is that a great majority of youth in their early teen years in these communities seem to be getting a reasonable dose of support. There is a base of opportunity on which to build additional supports. The discouraging news is how quickly these supports and opportunities decline for youth 15 and older, especially for those over 18. It is particularly disturbing to see the high percentage of young people (40 to 65%) who have never worked in a paid job and never participated in a community service activity. As youth enter their midteens, their opportunities for adult guidance, especially guidance related to education and work, seem to decline. This report does not suggest particular strategies for improving the chances of youth in borderline communities, but it does suggest that the base for providing the "growth vitamins" of support needs to be extended. (Contains 17 tables, 12 figures, and 69 references.) (SLD)