The "Move and Play" Boomwhacker Kit is ideal for music classes, P.E. classes, or any activity incorporating music and dance. With the basic collection of 25 Boomwhackers, a group of 12 or more can perform all the included songs and choreography found in the activity book and CD/DVD. The Move and Play Kit includes a durable carrying bag, 25 Boomwhackers, 4 octavarors. Tuned in B 2x, Ais 2x, A 3x, Gis 1x, G 3x, Fis 2x, F 2x, E 2x, Dis 1x, D 3x, Cis 1x, C 3x.