I have to say the Pirate Party they throw is a blast.
After two cruises I have started shopping for pirate shwag just for Disney cruises. The pirate stuff on board is totally geared to the kids. I 'm not really into wearing goofy ears
If you like "Disney", pin trading is in full play on board. I have a decent sized pin collection. I have a blast with the crew trading pins. Animal is my prized pin.