I did Greasy Grimy - though I'll be danged if I could repeat the whole work from memory now. It's a viral kind of thing. All kids are exposed to it by other kids. Some parents never get over it and pass it on to their kids. Those parents were all ways the ones that knew how to keep kids occupied with fun.

The little bunny foo foo is something I sure don't remember from being a kid, but my 5year old grand niece exposed me to it a 4-5 months ago. Funny thing is I just asked her about it and she can't remember it now.

Little Bunny Foo Foo,
Hopping through the forest
Scooping up the field mice
And boppin' 'em on the head.

I don't thing she knew any more of it that that.