It is a very big ship. And it is a very nice ship. Stay away form the Carnival Vaction Club sales leaches... (Maybe warn those that they are hard selling to stay away...)
As far as your kids are concerned, you have to trust that you have raised them well and that they will make good decisions. They can get alcohol on land too. Go, have fun and stop worrying.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007