Hi, Conch-Lers! Several years ago I discovered a plastic called "Shrinky Dink," a plastic sheet that you could write on with indelible ink and then shrink in the oven, producing a number much smaller than I can print. The disadvantage was that when glued on with Elmer's, the Elmer's left a very slight etching of the surface under it. Then, the material disappeared from local craft stores. I have now discovered a mail order source for theplastic, but now I need suggestions of how to attach the number to the shell. There's always Stik-Tac, or doll house wax, but these are not a very firm attachment, I would think. Does anyone out there have a suggestion? Don't tell me to number the shells with china ink by hand because I have a mild disability which affects my hand writing. Thanks! Linda