With toddlers this young, water access matters more than bells and whistles. Aulani strips away Disney-park chaos and gives you a designed-for-small-kids water playground plus calm beach—ideal for the 2-to-4 set. If you want more elaborate pools (and don't mind the price tag), Grand Wailea delivers the water-park energy without actually being a water park, and its connected pools work better for wandering toddlers than resort-hopping. Skip Waikiki crowds unless you're prioritizing walkable nightlife over naptime logistics.