When my granddaughter was small and wanted "to sew" with me, I would get my buttons out and we would find the duplicate buttons. I would thread a 6 strand embroidery floss, on a smaller tapestry needle..not much of a sharp point, knot the end, and let her "string on the matching buttons". When finished just tie and cut, and then you have matching buttons already together when you need them. She loved doing that!! And, we had "together" time. Good memories....now that she is 21!!