This JK Rowling story is really aimed at very young children. I've been a fan of hers since the mid 90s (my tribute CD to the Potter world can still be bought on E Bay) but I've only just got around to reading this because I'm not really keen on stories for the very young; they tend to be patronising.
The Potter series was very much for teens and adults. I adored them. And the Galbraith/Strike books.
But I loved this too.
She is such a good writer (plus I totally agree with her stand on trans).