Going on a Carvnival Cruise to Cayman Isl,Isla Roatan,Belize and Cosmel with 16 year old. Fun excursions?

You teenage spendthrifts never cease to agitate my gag reflex with such expensive excursions, likely paid for with a father's money, and even more likely better spent on a college education. I hear Aruba is nice this time of year.