We say :

Boomwhackers are sets of tuned percussion tube that are a brilliant way to get children engaged in music in the classroom setting. Colourful, dynamic, physical and, of course, musical they help you teach about melody and rhythm in a fun and engaging way. We can supply a range of the Boomwhacker products to our customers. Do get in touch if you need further information about this dynamic set of musical instruments.

Boomwhacker say :

Boomwhackers are fun and unique, tuned percussion tubes perfect for group participation or solo play. This set consists of 5 sharps/flats for a standard octave. It forms a different pentatonic scale which has its own pleasing sound and combines with the Diatonic Set to form a full chromatic octave of 12 notes. Tubes range in length from approx 13" to 23".