I believe I mentioned an example on the first page: viewtopic.php?f=285&t=12238#p359151 as well as noting that you should find example videos on youtube to see the process (which should help show you why / the type of pin you need): viewtopic.php?f=285&t=12238#p359155. Note for both those cases those are just examples, not necessarily the best or cheapest (aka I was just putting that together quickly as examples, you should look into it yourself of course).The ideal pin would of the capped type sometimes used with nametags. Any type of pin with a flat head should work, provided you can avoid being poked by the tip pointing upwards.The rule says tracing paper and pin. What kind of pin?
Not sure what Unome means by capped pin for nametags (maybe/probably same thing?), but hopefully that should work/helps. Specify if it doesn't, etc!