PHILADELPHIA (CBS) – Nine-year-old Ayub Mohamud ate two breakfasts, one at home and one at school, loved candy and chips, got little exercise, and had signs of being pre-diabetic. After starting Portland, Maine’s 5-2-1-0 program, he lost 3 pounds quickly.

While childhood obesity has leveled off, a third of children and teens are overweight, with the heaviest boys becoming heavier. The Centers for Disease Control recently awarded 39 communities $257 million to study youth obesity hoping to reverse this epidemic by 2015.

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Portland’s ‘Let’s Go!’ program is one the recipients and its 5-2-1-0 logo stands for at least five servings of fruits and vegetables daily, 2 hours less of screen time, one hour of exercise and 0 sugary drinks. The five year-old program, supported by businesses and health care experts, reports that 28% of children like Ayub have changed behaviors.

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‘Let’s Go!’ has expanded to 345 schools in Maine and to childcare centers, medical practices and after school programs.

Learn about ‘Let’s Go!’ in The Wall Street Journal.

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Reported By Dr. Marciene Mattleman, KYW Newsradio