My cousin in Japan has two children--8 and 5. Both kids know that they have family in America, and have learned a little bit of English. While my cousin and her husband can speak English, they do not speak it well enough to model good pronunciation, and they can't read English well enough to handle a print only version of this book. Until now, I had been sending CDs of me reading the books--kind of boring for the kids because there were no sound effects or anything engaging (and a lot of work for me). These books with the CD allow both children to hear English as it is spoken and learn proper pronunciation. They also become familiar with the concept of punctuation and English words. Plus, both children are familiar with the stories, having seen the movies. My cousin's husband has even used it to study 'slang' American English and to learn to recognize the different regional accents.
The kids can listen to it either in the car or at home, and when they get old enough/advanced enough in their study of English, can use the book alone.