RIO GRANDE VALLEY, Texas – Chick-fil-A restaurants in Rio Grande Valley are teaming up for “A Week of Sweetness” fundraiser benefitting the Vannie E. Cook Jr. Children’s Cancer and Hematology Clinic. Vannie E. Cook helps children in South Texas who suffer from cancer and blood disorders. For each Chocolate Chunk Cookie sold throughout the week, including individual and six count, participating Chick-fil-A restaurants will donate a percentage of all proceeds to the organization. Fundraising begins Monday, Feb. 10 thru Saturday, Feb. 15.