Percussion Plus PP794-1 Wak-a-Tubes 5 Bass, chromatic, c#29-a#38Fun, tough and very easy to handle. Its an easy way to teach and awaken all the rhythm and music. The material can be used by children and adults. Easy to carry and still buy the entire color set you can play any tune and build chords using 3 or more tubes. The tubes come in various colours, allowing songs to be communicated without using notation. This colour coding gives beginners the chance to experience some success without having to learn to read music notation.