Kum Ba Ya on Moozica SOLID WOOD Kalimba 17 key WITH CHAIN

The Moozica SOLID WOOD Kalimba 17 key comes with a chain for sound effects. The 'chain sound' changes according to length and where you drape it (I don't know if there are other uses for it as I've not found instructions). I don't think it does anything for Kum Ba Ya, but when I get to where I can play Drummer Boy all the way through without hesitation - I'm going to try it with that........