Day 1: Arrive + hotel pool. Day 2: Wuzhizhou Island day trip (ferry + buggy + aquarium). Day 3: Atlantis Sanya Water Park + The Lost Chambers Aquarium (full day at hotel). Day 4: Nanshan Temple + Tianya Haijiao by chartered car (grandparents-friendly). Day 5: Sanya Bay Coconut Dream Corridor + First Market seafood (light day + city resupply). Day 6: Yanoda Rainforest zipline + Yingge Ridge (kids burn energy). Day 7: Hotel breakfast + beach sand play + airport.
Key principles: ① Only 1-2 main activities per day; ② Return to hotel for rest from 12-3pm (peak UV); ③ Schedule a "hotel day" every two days; ④ Use chartered cars between attractions so kids can nap en route; ⑤ Pack sunscreen, mosquito repellent, kids' sunglasses, and wide-brim hats.
Recommended hotels: Atlantis Sanya in Haitang Bay (kids' paradise, but pricey); Mangrove Tree Resort in Sanya Bay (large family rooms, great value); Tianyu Resort in Yalong Bay (veteran family hotel with a well-run kids' club). Ticket budget: Kids under 1.2m enter most attractions free; 1.2-1.5m get half-price. Buy combo tickets on Dianping or Fliggy in advance — 20-30% cheaper than at the gate.