re: What to use to make a rattle rattle?

Popcorn, black peppercorns, and tiny nuts and bolts are my top three possibles at the moment, I think. I’ve got two octagonal rings of cherry glued up on a faceplate, and a backup dumbbell-shaped blank if the rings prove too complex for me.

Captured rings on a bigger ring would be a neat trick, Mos. You first?