How does a tennis ball achieve its signature bounce? Can you really get lead poisoning from a number two pencil? If a hot dog isn’t made from dog meat, what’s actually inside one of America’s favorite foods? And just how does a firework burst into multiple colors and patterns at exactly the right time? Find out the answers to these questions and more in this episode of “Engineered.” Take a fast-paced and fact-filled adventure into the world of product design, manufacturing and testing as we go behind-the-scenes to find out how people and machines create some of life’s most fascinating things.