On 18 December, close to 800 kids, 2,400 adults, and 1,200 crew set sail on the P&O Pacific Adventure, bound for the South Pacific. Lured by the promise of six sea days, three shore days (to Mystery Island, Noumea, and Lifou, no less), and Christmas Day at sea, away from the hubbub of life back home. Santa at sea didn’t mean it was a cruise full of Christmas grinches.