Harry Chapin's "Little Boy Blue" would be the one from the nursery rhyme:

Little Boy Blue,
Come blow your horn,
The sheep's in the meadow
The cow's in the corn;
But where is the boy who looks after the sheep?
He's under a haycock,
Fast asleep.
Will you wake him?
No, not I,
For if I do,
He's sure to cry.

The Man in the Moon turns up all over the place; for example:

The Man in the Moon
Came down too soon,
And asked the way to Norwich;
He went by the south,
And burned his mouth
With supping cold plum porridge.

The "silver spoon" may be a conflation of the spoon with which the dish ran away in "Hey Diddle Diddle" and the silver spoon which privileged children are said to have in their mouths when they are born.  "Cat's Cradle" is a children's game which involves looping string around the fingers in complex patterns;  "The Cat's in the Cradle" also has sinister undertones; cats were popularly believed to like to get into cradles and suck a baby's breath.  Certainly when I was small, prams left in the garden would have nets put over them to prevent cats getting in (they do like to sleep on peoples' heads, and I suppose a baby might actually suffocate as a result).

Malcolm