This 8 piece musical instrument set is called C Major Pentatonic Scale Pack by Boomwhackers. This product is designed for those young and old musical lovers. Boomwhackers are tuned percussion tubes that are available in Chromatic, Diatonic, Treble, and Pentatonic scales. These tubes will bring hours of musical fun to the whole family. Boomwhackers can also be used for educational projects such as math for counting beats, music for rhythm and harmony, science for pitch and length, visual arts, language arts, and much more.