I would also like to participate in the fe. Can you please give me exact details of what i would need to purchase i have been reading different things about it but still not quit sure how it works.
Thanks
Maybe this will help:
WHAT IS A FISH EXTENDER? (FE)
Outside your room onboard is a message holder, in most cases it's shaped like a fish:
The fish is there for Disney to place important communications to you such as excursion tickets and notes from the Cruise staff. It is like a mailbox for your room. A Fish Extender (FE) it is something that you hang off the fish. By hanging the Fish Extender off of the fish, the Cast Members can still use it for its original purpose.
THIS IS NOT A ONE ON ONE EXCHANGE, YOU ARE PART OF A GROUP. All the people in the exchange buy or make little items and place them in each other's fish extenders. It is great fun to come back and check the items you have received.
Once a cruise meet thread is up and running, someone in the group will (should?) step up and say "I'll maintain the Fish Extender exchange list". That person is the center point for all those who want to participate in the exchange. The list can be as simple as DISnames/room number/number of guests or as involved as full names/room number/ages of guests/like & dislikes/allergies/favorite characters/whatever is deemed necessary to know assemble the gifts.
Then each room on the FE list (note this will not be everyone on the Cruise Meet thread for your specific cruise), makes a Fish Extender holder. This is basically an organizer-type hanging bag with separate pockets for each person in the room:
The most common Fish Extenders are ones that have a pocket for each person in that stateroom. Some are very fancy, some are very plain. Some are store bought, some are homemade. Search "Disney fish extender" and you will get options that range in price. You should make sure your Fish Extender is between 8" & 12"" wide. Otherwise it starts to get in the way of your stateroom door. It should not exceed 5 feet; otherwise it will hit the floor. If you are creating your own it is suggested you make the pockets a little deeper than normal too. It will keep items from falling out and keep curious hands from reaching in (average depth is 5-6 inches)but 8-11 is a better way to go if you are making it yourself
They also make up gifts (either individual gifts or room gifts - whatever is decided by your group) to be delivered during the cruise).
One note about the gifts, some groups set up specific delivery dates, and specify "each person gets a gift" or "only one gift per room" or (even) maximum/minimum price ranges for gifts. Other groups just say "whatever", so people can choose what/how many gifts to give. Some give individual gifts, others only one gift per room, while others might do one for the adults and separate gifts for kids. Or only gift the kids.
HOW MANY CABINS WILL BE IN MY FE GROUP and WHO PARTICIPATES???
That depends on your cruise meet group. They range in average from 10-15 sometimes even 25 and up. Most do the smaller groups with the option to join more than one. It makes it more manageable.
This is typically a whole cabin event. You usually may not just sign up the kids. There are some cruise meet groups that have Adult Only groups. But not Kids only.
If you are signing up more than one cabin to participate, you should not combine them. It’s not fair for people to make items for 2 cabins and receive from 1 of them. They should be counted as 2 separate cabins.
DO I HAVE TO BUY FOR EVERYONE? DO I NEED TO GIVE PER CABIN?
Sort of…You have to do something for EVERY CABIN PARTICIPATING, You choose whether its adult gifts or kids gifts or cabin gifts or a combination.
YOU CAN NOT LEAVE A CABIN OUT IF THEY HAVE SIGNED UP. At the very least, 1 cabin gift, per cabin. Some do a cabin gift, and then do a few items for the kids. Some do individual for each member of the cabin. Some people are crafty and make gifts, and some are store bought. Some gifts are to be used on board and some are to be used at home.
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It feels so much more real now. So excited! 
