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. Nannerl Mouse is a charming toy mouse who plays the piano extremely well. She is Mozart Mouse s older sister and enjoys playing duets with him. She has a flair for directing musical theater productions and is highly knowledgeable about all kinds of music. Nannerl Mouse 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.