Sophie, a fifth-grader at North Stonington Elementary School, was in the nation’s capital as a young inventor invited to the National Invention Convention and Entrepreneurship Expo, held at the U.S. Patent and Trademark Office in Alexandria, Va. Out of 318 inventors at the expo, she won the Consumer Goods/Fashion Award for her “ChemotheraPop,” a nutritious popsicle for people going through chemotherapy. It was her grandmother’s experience with chemotherapy that inspired Broderick to experiment with ingredients like fruit and protein powder to make a popsicle that would be healthful and also soothing to the mouth sores chemotherapy patients experience.