[mangapunkrocker]

just sit them down with some info, pics and stuff...and calmly explain why you want to go....and what great advantages it would have....mention all the stuff they can learn and they can do....make sure to make a point that you wan to go there to learn about their culture and want to explore new things..and besides tel them that in cruises all you get to go see is the ocean and stay on land for like two hours.. (i think)