Writing for adults, you have to keep reminding them of what is going on. The poor things have given up using their brains when they read. Children you only need to tell things to once.
"Eight Days of Luke" was refused by another confused publisher on the grounds that children shouldn't strike matches. When my agent pointed out that David in the book was twelve years old, the publisher said that he was striking matches to summon the devil, then, and this couldn't be allowed.
It does not seem to me that I have the right to foist a story on people, most of whom are children who should be learning all the time, unless I am learning from it too.
It's a lucky child that knows that they're a genius, unaimed and all that.