From what our childern tell us, the Carnival and RCI kids programs are pretty close in comparison. The actual activities very of course but as far as the kids went, they enjoyed both.
They will NOT let the younger child into the older group unless they are VERY close to a birthday. SOMETIMES they will let the older child go into the younger group.
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