Obviously, printer ribbons and blank cards aren't free, but the supplies are minimal -- the ribbon and blank plastic card costs less than a dollar, depending on shipping, and a new RFID card adds about 25 cents. There will be a contribution jar, and acontribution of a toonie each time you replace a card would be excellent, a loonie would be cool, but this is not required.
== What about lanyards and holders? ==
This printer was actually bought to do souvenir name tags at a large scout function a while back. The kids loved them.