1. 衝浪板   sand castle   sea   shore   surfboard   Hint Half-n-half Clue   2. 救生員   lifeguard   shell   shore   sea gull   Half-n-half Clue   3. 海   shell   sea gull   sea   sand   Half-n-half Clue   4. 游泳褲   swimming trunks   swimsuit   surfboard   wave   Half-n-half Clue   5. 鐵鍬   shovel   sand   swim   lifejacket   Half-n-half Clue   6. 沙子城堡   wave   sand castle   pail   shell   Half-n-half Clue   7. 游泳   sand castle   swim   shovel   sea   Half-n-half Clue