Sorry. I meant to write
Personally, I'm not convinced that rhyme "Yellow yellow" had anything to do with skin color.

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Forsh, I'm curious about you reference to "Rumbylowe". I tried to find more about this group by Google, but didn't get very much. However, I did find a small blurp [but no examples]about about skipping rhymes that are found in Rumbylowe's album, 'Jolly Rumbylowe'.

Is this an Australian group? Who sings these songs-adults or kids?

I assume that "skipping rhymes" as mentioned in this blurp may be the same or similar to what Americans {UnitedStaters} call "jumprope rhymes". And, since jump rope rhymes is a generic term in the United States that includes "handclap rhymes" and rhymes that accompany other movements done by children while they chant rhyming verses, maybe that's the same as the Australian [?] skipping rhymes that are featured in that Rumbylowe album.

It would be great to learn more about this.