Is drilling shells toxic?
BEWARE the dust if you drill shells. It’s likely quite toxic. Wear a respirator and gloves.
How do you string a shell?
You use a sharp pointed nail and hammer, hit each shell in the center with the nail and hammer, string 3 inches apart on the string and make a knot in the fishing line below each hole. Put dot of glue on the knot. Make each shell string about 2 feet long, or as long as you wish.