Boomophone - XTS Whack Pack A set of Boomwhackers roped together to for a boomophone. The same concept as a xylophone, just more child friendly. 8-Tube Boomwhackers C Major Diatonic Scale Set XyloTote Tube Holder Boomwhacker Whacker Mallets Whack-a-Doodle Doo! Songbook Octavator Tube Cap Instructions