In the evening, the children told their father what they had seen at the zoo.
In the evening, the children told their father what they saw at the zoo.
Now i understand both the sentences are grammatically correct. What i want to know is, what's the point of using the past perfect tense there? I mean, it does make it more clear that the kids went to the zoo first, and told their father what they had seen there second. Is there any other reason why we should use the past perfect there?
When Jane had seen the elephants, she wanted to see the giraffes. (second action happened after the first action had been completed)
Could we not mean the same by saying "After jane saw the elephants, she wanted to see the giraffes?