With toddlers this young, you're looking for one thing: built-in childcare infrastructure that doesn't feel like a glorified daycare. Beaches Turks & Caicos and Hyatt Ziva Cap Cana are the closest you'll get to worry-free — both are engineered specifically for the under-5 crowd with water parks, character programming, and staffed kids clubs that actually work. Turks & Caicos edges out the pack for sheer beach quality (Grace Bay is legitimately world-class), but Cap Cana's gated, quieter setup appeals to parents who want zero crowds. All-inclusive is non-negotiable at this age — you're paying for all-you-can-eat convenience, not variety.