For a crew this young, Margaritaville Beach Resort is the practical pick—it's built around toddler-friendly logistics and won't nickel-and-dime you on every meal. If your budget stretches and you want the water-park experience without Atlantis's sprawl and crowds, Grand Hyatt Baha Mar scales better across the 2-to-4 range with its pool setup and structured kids program. Paradise Island options work if the kids are older; for this age group, Nassau's simpler setup beats fighting tourist infrastructure.