Badge Ribbons
From ConRunner
Ribbons can build cohesiveness among the convention staff (if you keep the count of different ribbons low), or among subsets of the staff (if you keep it high), but probably not both.
If ordering from Hodges bear in mind that they shut down for a week between Christmas and New Years, and then spend the following week catching up, so they will not schedule deliveries between (typically) December 21 and January 11.