Her's another example of "We wear our hair in curls" that mentions mini-skirts and includes the "toy/boy" line:

We are the Millfield girls
We wear our hair in curls
We wear our dungarees
Right up above our knees
We wear our fathers' shirts
Instead of mini skirts
And when it comes to boys
We treat them just like toys
We neither smoke nor drink
That's what our parents think
But when they're out of sight
We do it day and night

http://answers.yahoo.com/question/index?qid=20071104023000AAle8Ch

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Unfortunately, like most examples of children's schoolyard rhymes found online, this example has no demographical information as to when the poster learned it. The name "Millfield" is given, but not where "Millfield" is located or if it's a city, school, camp or some other group.