This one is a rumba-box/cajón/percussion-gadgetry agglomeration. Originally it was just a rumba box, that being the term in the English-speaking Caribbean for a bass kalimba. But I found that it also worked very nicely as a cajón, that being a wooden box made to sound good under a variety of hand-percussion strokes. In this it was aided by the fact that sympathetic resonance in the tines greatly enriches certain kinds of percussion strokes. From there it was an obvious step to attach several more percussive sound-makers, including spring-mounted metallic sounds and clave sounds, shekere-type beads, shakers, rattletines, and a couple of bells. This thing is really fun to play.