Hearts' Stories is a program that began in our school a few years ago. If you get some time to check it out, it's great. http://www.heartsstories.org/
My class has been doing it since the beginning of the year and we love it. One of our first adult guests was Mr. King (as the kids call him). They loved it! He played his guitar to a song our class had been practicing. They had a great time and learned so much!