React to the story about food choices for children and the fact that they choose healthier food when they got a reward.

This depends on what you value and how you parent. Certainly rewarding kids for choosing healthy alternatives is a form of behavior modification. The question that arises is if the children will continue eating healthy food, as they age, in the absence of a reward system? Check this out:

http://freakonomics.com/2014/07/17/why-you-should-bribe-your-kids-a-new-freakonomics-radio-podcast/