The Boomwhackers Boomwhackers BW-EG Set is a seven-piece soprano extension for a chromatic or diatonic set of boomwhackers. Matching their note values, the tubes have a certain color. With this visual connection, notes and music theory can be taught and learned even more playfully. The Set includes seven plastic tubes with which the notes C#'', D'', D#'', E'', F'', F#'', G'' are covered.