One of the cool things about our cruise in early summer, was this thing they called "The Aqua Ducky Derby". We were there for the "1st one, ever"
Basically, kids (big and little) would buy one of these little rubber ...ducks for some nominal amount ($5/ i think) and then come at an appointed time to decorate their duck. Then on the last full day at sea, they raced them down the boat's water slide (The AquaDuck - named thusly) The proceeds went to, Make-A-Wish.
Here Jena played with her Ducky during the decorating sessioin..