Amanda, I just returned from sailing on the Fascination. My friend brought his 16 year old daughter along as her birthday gift. She had a nice time, but I think from 16-20 is tough. They are old enough to do more adult things, but cant use the casino or clubs. There was a teen disco "Backstreet Club" but she checked it out and said it was too young of a croud for her. We did "sneak" her into the casino one night with us and sat her between us at the slots and let her play...she looks mature for 16. Other than that the pool areas are crowded with children of all ages during the day! And when your in port most likely you will be doing something on shore. I am sure they will enjoy it one way or another! Check the activities in your Carnival Capers paper you will receive in your cabin nightly.Have fun we all did!!!