Stamford, Connecticut-An inflatable Betty Boop will be a highlight of a Stamford parade on Sunday 20 Nov. It took a team of artists and engineers three months to turn the cartoon character into a 21-m tall, helium-filled balloon made of polyurethane coated nylon. Some 24 balloons will appear in the parade this year, which its sponsor, city newspaper the Advocate, says is one of the largest helium balloon parades in the country. New Castle, Pennsylvania-based Starbound Entertainment made eight of the balloons in this year's parade, with other balloons from Big Events in San Marcos, California, and Dynamic Displays in Ontario, Canada.Either polyurethane-coated nylon or PVC is used, with pieces cut for each section, and heat-sealed to create the shape. PVC comes in different colours, but the PU- coated nylon used to create Betty Boop requires painting."