I'd like to introduce dd to some science fiction (something more sci-fi than fantasy). The main problem is some of the adult themes. She's 7 - but I will be reading it to her so could help it if it gets a bit complicated. But she follows the page so I can't actually skip bits.
I have the Anne McCaffrey dragon books - but they are really fantasy rather than SF. I don't feel any of my own proper SF is sufficiently child-friendly (although she has enjoyed my ancient Star Trek annuals).
Any suggestions?