Boomwhackers XyloTote Tube Holder, Boomwhackers Item XT8G.
Used as a carrier, it accommodates 8 Boomwhackers Musical Tubes, a pair of Boomwhacker Whacker Mallets, and a "Whack-a-Doodle-Doo!" songbook. Two or more can be combined end-to-end for a wider range of play. Made of cotton, elastic, and hook-and-loop fasteners.