What are the degree of options?
Do not allow them to drive is at one end with Do nothing at the other. I propose that most parents will do something within those parameters. I can think of a handful of discussion and demonstrations that would be pretty persuasive. In other words I would be inclined to have a sliding scale starting with discussion and education, which falls closer to the Do Nothing end.
The above analogy is a pretty typical problem solving exercise. Analogy? Oh, did I forget to mention this is about Childhood Obesity?
Obesity does have a number of health risk factors. It is a problem. So how to solve that problem?
Same degrees of options apply Do nothing to incarcerate the individual until they show proper health habits...
Seeing as how we do have mandatory schooling in this country and, to me, this is an educational issue. How about evaluating each kids health and informing the parents?
Or Having a class on exercise and health benefits, with Instruction, Hands on and Reading components makes a certain degree of sense.
If you wanted the same thing but done private sector you could push that burden to insurance companies with something like lower rates if your fit, or some insane idea like that.
Federally you could impose a Fat Tax on anyone obese. (okay, getting to much on the sillier end of things).
Of course you do need to factor in that being Fat does not pose health risks to everyone. (Here is the layman term press release of same). There are "thin" people with the same health issues as fatter ones. So why target the fat? Why not target the unhealthy? or why target anyone? Why not target everyone?
At Connors school the decided to eliminate the icing from the cinnamon rolls (because 48 less calories will solve obesity in children?). They also made the soda machines carry non-sugar\low sugar beverages. Anyone who has met Connor can see he is not in the fat category. If you spend a day with him, you know he falls into the fit category as well. Further he has a very tough time with Change. So I get a phone call from a lunch lady (who apparently loves Connor's demeanor) asking permission to add icing to his cinnamon roll. Curiously, I was not consulted to remove said icing.
As for the soda machines, what was the outcome? Jr. High students left campus to the corner store and bought a 64 ounce soda, instead of the 12 ounce they were drinking. So kids drank MORE SUGAR!