8 Best Family Cruises 2024

With its seven neighbourhoods, including the kid-friendly Boardwalk, the world’s largest ship (along with sisters Oasis of the Seas and Allure of the Seas) has enough action-oriented amenities—from an ice rink and carousel to a zip line and the tallest slide at sea—to keep kids of all ages entertained. More than three football fields long, Harmony holds up to 6,272 passengers.

Best for: Daredevil kids and their parents—but there’s lots for tiny tots, too.

Coolest itinerary: Seven nights round trip from Fort Lauderdale, Florida, to the Western Caribbean, with calls on Falmouth, Jamaica; Cozumel, Mexico; and Labadee (Royal Caribbean’s private island) in Haiti, Price: from $924 per person.

Why it's great: It’s a marvel of engineering and imagination: big, bold and playful—what kid wouldn’t love meeting Shrek or getting soaked by a drench bucket in the splash park?—with multiple oceanview and interior cabins (featuring a virtual balcony or overlooking the promenade) that let little ones be safe as you enjoy the sunset.