The possibilities are obvious http://www.youtube.com/watch?v=EA3l7ESSfdU especially when one sees that a diatonic octave can be purchased. http://www.amazon.com/Musical-Instruments-Rainbow-Colored-Children/dp/B003LRI7YU%3FSubscriptionId%3DAKIAJTLXKNCCPF26L7WQ%26tag%3Dnud-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB003LRI7YU Laura Dickerson