I have already indoctrinated my three kids with Star Trek, the have actually watched the Motion Picture quite a lot, and they love the cloud scenes and Spock Walk. There is something visual about that movie that works. I agree that I would never torment my kids with the Star Trek V movie, although I indulge in it as a private guilty pleasure occasionally and the score is superb
My nine-month old daughter lights up at three pieces of music: Courage's Star Trek, Williams' Superman, and Little Einsteins. (She's kind of fond of Giacchino's Spock theme too.)
My son got pretty good at identifying composers when we watched movies. Well that is if it was Goldsmith or Williams since he heard them so much during his childhood. Indoctrination can be a beautiful thing! Unfortunately, my musical influence over him was not the same as my dad's was over me and he's into Rap/Hip Hop (you can just hum those tuneful melodies all day long!). You might say, well that's the "music" of his generation, but I can tell you I most certainly would have hated it if it were for mine. Where did I go wrong?! More indoctrination Neil, more!
My 6 year old son is the same way. It's always, "What's going on now, Daddy?" Just yesterday, he was walking around the house humming the main theme to Kings Row! I've never even played it for him (yet). He picked it up from me humming it. I think he's trying to work out the difference between that, Superman, and Star Wars.
Once, when he was 5, I played Mysterious Island for him. We acted-out scenes from the movie as we imagined it (neither of us has seen the film). During the appropriate cue, I pretended I was a giant crab. He SCREAMED!!! I had to turn the music off and comfort him. Never underestimate the power of Herrmann to terrify little children.
Reminds me of an assignment I had in elementary school music appreciation class. One time we were asked to listen to some orchestral music (not film music) and draw what we imagined was happening. I'll never know what the name of the piece was, but I ended up drawing someone running through Japan. Funny how kids imagine different things in music visually; it's all part of their imagination. Cute story.
be proud as a parent as many adults cant listen to filmmusic and hear what is going on or what the music should accompany... 
