The ice cream truck was pioneered by Harry Burt of Youngstown, Ohio. Burt, who created the Good Humor bar, outfitted a fleet of 12 refrigerated trucks with bells to attract customers. The iconic jingles played by everyday ice cream trucks were originally chosen because they were well-known, public-domain folk songs (like 'Turkey in the Straw') that could be easily played by simple mechanical music boxes. During the 1950s, the ice cream truck became a symbol of the American suburbs. Today, modern trucks use digital speakers, but many still play the same century-old melodies to evoke a sense of nostalgia.