Mothers breast-feed their children of different ages during the Second Synchronized Breastfeeding Worldwide event near Manila, Philippines, in October 2008. Pat Roque/AP hide caption toggle caption Pat Roque/AP Opinion What's Right About A 6-Year-Old Who Breast-Feeds January 15, 2015 A UK woman's breastfeeding of her school-aged daughter has caused a furor. Anthropologist Barbara J. King tells us why everyone should calm down — and why prolonged breastfeeding can be beneficial.