Does Anyone Know the Name and Author of a Poem Like This?

[Anon]

I think the poem may have been by Shel Silverstein, but I haven't found it yet. It's like a reincarnation poem, kind of written in a children's style, where they talk about fixing bones and tunung up a human and making the child into a baby or something. I have no clue what the title of thep oem is, though...