The legend of a little boy (maybe a shepherd?) showing up at the manger with a drum is one that's come down to us through the ages. I imagine there are many manger scenes that have added a drummer along the way (I have one). While there is no evidence from the story in the Bible that such a boy showed up, but the song that perpetuated the story has become part of our Christmas tradition throughout our society. It has spawned new stories, clay-mation TV specials, and a host of recorded renditions of the song.
There is one that features drummers, one that couples the vocal talents of Bing Crosby and David Bowie (a personal favorite). But the secret to getting this song is the "pum-pums". I like the way this group hits them, maybe you will too:
It Is We Who Must Be Bent
4 hours ago