In addition to all the other stuff you're doing, you should definitely try to get some reading material in French that interests you. Reading (professional) writing by native speakers is a great way to check comprehension, build vocabulary, and get exposure to correct (or at least standard colloquial) grammar. It doesn't replace practicing the grammar yourself, but it really helps you develop a sense of what looks right and what doesn't, which is especially important when you're on your own and don't have a teacher peering over your shoulder all the time.

I wouldn't worry too much about teaching your offspring bad grammar. If you give them the basics, they'll pick everything else up from their classmates as long as they aren't too old.

As for what in particular you should read, I loved Diva in English translation, so if you liked the movie of that, you might check out the book series. They're all quite short from what I remember. Tintin is always a popular choice for study, as is Asterix (though watch out for the accents and speech impediments in some volumes). There are some manga available in French translation that have never been translated into English. (Onmyouji is a notable example, though I have no idea how hard the French is.) You could also look for translations of books you liked in English.


I also second the comment about replying directly. I almost never see responses unless I get a comment notification.