In “One and Two is Three,” simple arithmetic is a metaphor for reciprocal love. In Margot Bevington’s debut album, her gentle, original tunes are chock full of imagery that both the young child and parent can relate to and enjoy. Early learning was never more pleasant than when relaxing with Ms. Margot’s tunes that go from catchy and upbeat to lullaby and rest. “One and Two is Three” is all about discovering the world anew with your little one.