All of those dollars and sugary calories are stoking the childhood obesity epidemic. Currently, in the U.S., about 17 percent of children and adolescents are obese—that's more than 12.5 million kids. And new (research) in the British Medical Journal suggests that obese children will have much higher risk factors for cardiovascular disease as adults. Even as kids, their hearts are changing shape to look like those of adults at risk for heart disease.

But the good news is that simply cutting out an (average) of 64 calories a day from kids' diets could start to level out the steep rise in childhood obesity. That's equivalent to less than half a can of most non-diet sodas.