At 14 and 16, your kids are past the splash-pad phase but not quite ready for adults-only retreats. Grand Hyatt Kauai and Fairmont Orchid both nail that sweet spot: snorkel lagoons that don't feel babyish, cultural programming that actual teens engage with, and enough resort infrastructure to let everyone do their own thing. Kauai's got the edge for genuine downtime; the Big Island's Kohala coast skews slightly more active. Maui's also solid if you want a beach resort that doesn't feel trapped in spring-break mode.