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There is an age limit as far as the slot machines are concerned but there could be one or to games consols in the childrens' adventure area, I just don't know that ship. Cash has to be used in gaming machines and if you are that unsure of your childrens' actions then I would keep hold of their Sea-passes and them for that matter. Sorry to be so schoolmasterish but the question would never have to asked of my family .... Neil.
On American ships children have to be over 18 to play in the casino and over 21 on Alaska itineraries.