In this Tuesday, Jan. 21, 2014 file photo, Oumou Balde, 4, left, plays with her teacher Jacqualine Sanchez, right, and some pretend food in a pre-kindergarten class at the Sheltering Arms Learning Center in New York in a program that was produced in conjunction with the Sesame Street children's television show to educate children about nutrition and health. A new study published in the New England Journal of Medicine on Wednesday, Jan. 29, 2014 finds that much of a child's "weight fate" is set by age 5, and that nearly half of kids who became obese by the eighth grade were already overweight when they started kindergarten. Researchers think there may be a window of opportunity to prevent it, and "we keep pushing our critical window earlier and earlier on," said Solveig Cunningham, a scientist at Emory University. (AP Photo/Seth Wenig)Those efforts to battle obesity in colleges? Assume youthful. A brand new learn about finds that so much of a kid's "weight destiny" is about by age 5, and that almost 1/2 of kids who become obese via the eighth grade have been already chubby when they started kindergarten.