Oh my! Harmonia has a choir of little frogs, but they are all croaking their own favourite song at the same time! It sounds like a big, jumbly mess. Let's help them sing together beautifully. A) The Story of Three Notes That Learned to Sing Together. B) Two singers want to make harmony. Should they sing the exact same note, or two different notes that sound nice together? C) Let's try singing "Row, Row, Row Your Boat" as a round!