Alfred Music Publishing is the world’s largest educational music publisher. Alfred produces educational, reference, pop, and performance materials for teachers, students, professionals, and hobbyists spanning every musical instrument, style, and difficulty level.

Nina Ballerina is a graceful toy ballerina who dances while Beethoven Bear and Mozart Mouse play the piano. Her parents both danced in the Russian ballet many years ago. She's dressed in a traditional pink tutu and dances gracefully on the music staff, pointing to different notes and intervals with her delicate shoes. Nina Ballerina is a replica of the character first introduced in Lesson Book 3. Suggestions are made in the Lesson Book for integrating the animals into the lesson.