I've been thinking a lot lately about pop music for kids. For one thing, my iPod has been at capacity for a while, and when the next model comes out, Sophia will get mine. But what to put on it? Also, we are quickly approaching the time when I need to make sure that certain words are infrequent in, if not absent from, the tunes I play around Sophia. Finally, I've been thinking about what makes a good song for kids, and whether there's any particular reason kids and adults can't like the same stuff.
For example, almost anything by They Might Be Giants would count, but they've produced some specifically-for-kids items (mostly like the regular TMBG plus some educational qualities and minus a fascination with death). And I suspect that almost anything from the Shins' Chutes Too Narrow will be appreciated.
I have no idea about the appropriateness of the lyrics for this song, as I can't understand most of them. Or, at least, I think I can understand most the words that are in English, just not whatever is being communicated. But I do think that "Chu chu chu chu beep beep!" qualifies as kid friendly.
What are some examples of grownup pop that makes good kids' music?

I was just reading a review
I was just reading a review of the album this track comes from ("Friend Opportunity") and the lyric apparently contains "Choo" galore, but nary a "chu". Of course, that changes everything.