The school are giving her work, the mother said the teacher send her child lots of extra worksheets & my dd said the teacher has given the child folders with "much harder English & maths" that she does when she's finished before the others...
I had that sort of thing at school, although it wasn't really very good extension work.
Regardless, what I loved was to do more and more workbooks and exercises at home - didn't matter if it wasn't hard, I loved doing the endless repetitive practice of things too. If you are good at something, it's very satisfying to do more of it, and to see yourself getting things right, or getting faster at them etc. I enjoyed all the maths books, problems, puzzles, times table games, whatever, hugely. And all the reading I could do - plus things like finding out about words and why they were spelled like that, and history of language and word roots, etc. The more worksheets, the better - it was something I liked doing. And yes, it meant that I found school easier and easier, and I'm sure other people didn't like that, or thought that it was somehow unfair that people thought I was a 'natural' when I did extra work. But actually it's a combination of things - if you are naturally academic, you often really enjoy doing more and more, and it then feeds on itself. A non-academic child probably wouldn't have felt the same about extra work; nor would it have had that kind of effect.
I wanted to be good at music, but wasn't as naturally musical as some children. I did practice, I did work, but it was always a effortful and not hugely enjoyable to practice. I liked the results, and wanted to get into orchestras etc, but I wasn't desperate to practice like the children who really were naturally good and then got better. I got to a decent level of competency that regular persistent work gets you to, but never outstanding or special. But academics were different - I enjoyed it all, would actively choose to do more, because I enjoyed it and it made me feel good to do things I enjoyed, and I can imagine musical children felt like that about music.
so maybe people who don't believe children can want to do academic work for pleasure are a bit like me with music - they appreciate the end goal, but see it was work to get there, rather than fun. But some children see it the other way.