Thanks for that info Dwayne. I have always tried to do this at check in before the cruise and the agent always looks at me like I grew horns! I'll try this on our coming up cruise.
Now that you say it, I do remember the cash to tokens machines on the Carnival Spirit... so that may be easiest and then they can just carry their used tokens back to the cabin. Our kids at not big video gamers so I can't say for sure that its the same on all the ships, but I don't see why it wouldn't be.
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