The Oldham Tinkers sing a lot of kid's songs, including firecat's Poor Mary (though the lament is for her lover, rather than her playmate!). They follow it up with:

Don't touch my silk dress
My mother can tell
My shoes are guinea gold
While yours are black lead

My bonnet is blue
My heart it is true
And I dare not be seen with such rubbish as you!

Kids can be cruel, sometimes...

LFF