Yeah, when I grew up the school cafeteria food was probably balanced and nutritious, but it tasted so bad I couldn't eat it much of the time.  As a result of that and a lot of physical activity both at home and at school (gym was mandatory) weight was not a problem.  In fact I can only recall a couple of overweight kids in our school, and it is likely they had some glandular problems or a strong genetic disposition.  Today, in the same area, there more obese kids than in most other states.

See this link for detailed info about child obesity stats.  No it's not just poor kids.  In my home state the rich kids are more likely to be obsese.

I can swear there ain't no heaven but I pray there ain't no hell. _ Blood Sweat & Tears