When trying to string items with very small holes, there often is not enough room for a needle and two thicknesses of stringing material. You can stiffen the end of a single piece of soft stringing material by dipping it into super glue or a clear cement.

Wipe the excess from the end of the string and let it dry thoroughly. Drying on a piece of waxed paper or propped in the air is the best technique, as the end will stay rounded. If the end of your "needle" wears down while stringing, you can trim a bit of the end with sharp scissors and continue on.