Mariella Mouse and her friend, Mozart Mouse, live in a house with two elderly musicians who fill the air each day with beautiful operatic arias. Mariella and Mozart love their singing. But life is lonely in the evening when the old man and old woman don their coats and disappear. Curious about their destination, Mozart decides to accompany them on their outing. When he doesnt return, Mariella decides to go in search of Mozart. Their discovery is an adventure where chaos reigns, but ends with important lessons learned. The reader is introduced to Voices of the Opera, Famous Composers, and the Opera House. To enhance the learning experience, a comprehensive Appendix supplies the needed information for parents and teachers to engage children about these subjects. Teachable Moments poses questions for discussion.