So the FE group is a group of people onboard who do a gift exchange. There really aren't any rules, google Fish extender or search on etsy to see the door hangers with pockets that go outside your stateroom door. Think party favors. I will give some examples of things we have received in the past. Picture frames, tote bags, cruise ship survival kits, candy, flashlights/night lights, reusable water bottles, personalized items-i.e. christmas ornaments with family name, tattoos, lots of pirate items, mini alcohol bottles, cookie cutters with recipes attached, coloring books/crayons, packaged food items, "pixie dust", and the list goes on….
Last time I did an exchange with 21 room, I gave individual gifts for each child and gave a stateroom gift of salt water taffys. The FE I was supposed to participate in on the 10/20 cruise, I was giving one gift bag per room with a "kit" inside.(35 rooms).
In any event, I won't lie, it is quite a lot of work secondary to what you are going to give, ages of children involved and allergy info. But I can say that my children were positively thrilled coming back to their stateroom to see what "surprises" were in their fish extender, and that alone is enough to have me do it over and over again.
SO in any event, now that I have some experience with this, I am completely willing to put together the master FE list and coordinate it for any families who want to participate.