Have you watched School of Rock with Jack Black? This is a great movie and inspiration to play guitar.This movie is suitable for kids and will motivate them to take up an instrument and practice. The next missing bit is the right guitar teacher. There is a reason I am telling you about this film. I believe that guitar lessons either for kids or adults should be fun. I try to make them fun while still teaching all music theory concepts such as rhythm, ear training or even sight reading. I even prepare my students to take Rockschool exams. If you like the movie be sure I will teach your kid the way Jack Black teaches his class. My lessons are not only about music but also about life and for sure they are life changing experience your kid deserves to have.