My Rebbe once said the best prevention to this is of course constant Tefillah, and an active, enthusiastic, cheerful and delightful approach to Avodas Hashem at home. Keep hammering away, indirectly (and of course truthfully, no masquerading, let yourself too be carried away), not by lecturing, the vibes will exude, they will penetrate eventually.
Read what Rabbi Miller ??”? says about “propagandizing” Hashem’s derech.
One more point which I think is very lacking in today’s dor r”l, the importance of NEVER EVER belittling ANY Godol, Rav or Talmid Chacham in one’s home. A child who hears a parent disparaging any Godol will not grow to esteem, revere our Gedolim properly, his parents too will have diminished their stature in his eyes. A grave mistake. A child should only hear admiration and praise about Talmedei Chachamim. ANY and ALL.