Boomwhackers are simple idiophones in the shape of long plastic tubes that have different pitch levels. There are diverse sets with tubes that are matched with each other harmoniously. By striking them on different objects and surfaces, various sounds can be achieved. Boomwhackers have become increasingly popular because they are affordable and almost everyone can easily play them. They are also applicable for early education or for using them for music lessons in schools.
There are diatonic sets of one particular octave and supplementary chromatic sets. In order to have access to all tones of an octave one should consider buying both sets right away.