A kilt pin is simply a decorative item used to weigh down the corner of a kilt's apron. Almost anything of the appropriate size and weight can be made into a kilt pin. Heck, you could make an inexpensive kilt pin by hot glueing a pin clasp to the back of a quarter (a US 25 cent coin).

Is there any interest in a kilt pin contest? The most original and/or interesting kilt pin wins bragging rights (or maybe even a small prize from one of the advertisers?).