When my children (aged 4 & 7) went the kids ran the gamut from ages 3 to 10. They did seem to be well supervised, and every child had to wear a life jacket for the duration of the cruise, so one of my big fears was handled. Unless you cancel at least 24 hours in advance, a portion of the cruise fee ($15, I think) will be charged to your credit card. If you're concerned about the cruise, do you think your daughter might enjoy the Alice in Wonderland tea party? It's only 1 hour long (as opposed to 2 hours for the Pirate Cruise) and you could hang around nearby at the Grand Floridian to make sure everything was going smoothly. Just a thought, Dopeydays. Even though my 4yo DD is very outgoing, I was a lot happier knowing that her older brother was there with her, too.