Ivonne Borrero, center, and her son, Jose Roman, 11, walk along Boston Harbor Tuesday, Nov. 27, 2007. The family is participating in 'We Can!', a federal anti-childhood obesity program that pushes subtle changes at home to help keep kids from growing out as they grow up.  (AP Photo/Josh Reynolds)AP - Ivonne Borrero liked that her son's teacher was pushing him to do good work. She just didn't like the rewards: The pizza parties and Burger King coupons weren't helping 11-year-old Jose's waistline.