Hi and Welcome!
The fish extender actually hangs from the fish beside the door. The fish that is there is for staff to leave notes, etc. The extender is sort of like an organizer, although some people have just used gift bags, tote bags, etc. You can do a search a find loads of information. Once I gather the names and room numbers of everyone who wants to participate, I will send them to everyone. Each family will buy or make inexpensive gifts for the other families and deliver and put them in the fish extender. So, when you come back to your room, you will have a surprise. You can also do a search for fish extender gift ideas. People have done magnets, stickers, candy, personalized items, pencils, etc. Some deliver gifts every day and some only do one day. It will be totally up to you. If we have alot of cabins who want to participate, I will probably divide it up so we don't have soooo many to buy for. I read where another group did that. We certainly don't want 100 cabins to have to deliver to!
I am a planner like you, so I have done search after search and now I'm already planning my gifts! I will probably wait until after Christmas to start asking for everyone's information and then close it out a few weeks before so we know exactly how many to buy for. So, your daughter will turn 8 on the 29th?
Also, people make magnets for their door. They are cool! You can find loads of information about them as well. Any questions, just ask and I will be glad to help. This will be our 4th
Disney cruise and my 10th cruise total.