For years, my mom was terrified of ever considering giving me a Mountain Dew, for the reasons you mention above about hyperactivity (Diagnosed ADHD in 1991, Asperger's in 1997). Then one day, she decided I could try one, I must have been doing something right that day.

What's funny about this is that Mtn Dew had the exact opposite effect! I actually calmed down! Granted I don't drink the stuff anymore (BVO is awful stuff), but it was kind of funny to see the opposite result of what was expected. I guess my point is to tailor the diet to the needs of the child. Not everything is inherently bad, and not everything is automatically good.

Veggies are always good, though. Always serve veggies