My daughter participated in Club Mariner over a Christmas cruise. She absolutely loved it; even said it "was better than Disney". They have a wide range of activities for the kids: games, movies, scavenger hunts, kitchen tours where they get to make and decorate cookies, a private dinner on one formal night so Mom and Dad can have some private time, various crafts, etc. It's a pretty full schedule, especially on sea days. The counselors we had were fantastic! There usually aren't a ton of kids so they get lots of individual attention.