The best way to help a child move toward a normal weight if he or she is overweight is for the whole family to adopt a healthy lifestyle, says pediatrician Mary Ellen Renna, M.D., author of Growing Up Healthy the Next Generation Way: Add Years to Your Child's Life & Life to Your Child's Years (SelectBooks, 2007). Everyone should eat lots of fruits and vegetables and exercise regularly, she says. “Never target one child to lose weight while the other children are eating junk.”