Went on Ocean earlier this year and really loved the ship. Sounds like thats a school break time, so there should be quite a few kids your daughters age. We went during spring break and there were a lot of families with kids, teens, etc.
Really was a good mix. This ship is beautiful, service is great, food was really good, so you are in for a treat, enjoy it. You may also want to post on the "Meet on board" here at cruisemates and find other families also going on Ocean when you do, good luck and have a wonderful time :-)