- 1) Age between 4 and 9 years. We propose to use this age group since parents are in control of the eating and exercise choices of such children, and thus a program that focuses on parenting behaviors (i.e., positive reinforcement, stimulus control, parental modeling) should be developmentally appropriate. This age group also meets the Expert Committee's goal of intervening early5; moreover children aged 4 to 8 years have similar nutritional needs.