I'm late to the party here, but I'm very amused by the fact that the Kirin episode of My Little Pony was essentially an allegory for freedom of speech. Much like the obvious comparison to Communism in a previous storyline, it's a subject you rarely see in a children's show, and it was handled excellently for all ages to understand without it being preachy. I hate to jump on the whole "in these trouble times" bandwagon, but the current social climate we find ourselves in is a very good time for such a topic to be approached so well. Plus I loved that song. It's going right into my list of "Personal Mottos That Were Originally Said by Cartoon Characters but That Doesn't Make Them Any Less Relevant."
'Cause rainbows won't light up the sky
Unless you let it rain
And candles just won't glow until they're burned
No, you can't give up your laughter
'Cause you're scared of a little pain
It's a lesson that my village never learned
(And for those who will immediately jump up tell me that it wasn't about freedom of speech, let us not overlook how much Autumn mourned the loss of artistic expression when her people took a vow of silence.)