Bible Songs to Tunes You Know Bible Songs to Tunes You Know is a collection features "piggyback" songs. A "piggyback" song is one which has words set to tunes that children know, such as, "Old McDonald Had a Farm," or "Twinkle, Twinkle, Little Star." The words written around a Bible story, character, or theme, and are created to fit a popular tune. Piggyback songs are popular with preschool children"s choirs, vacation Bible sc... Full description