The Missing Piece

Has anyone read the book The Missing Piece by Shel Silverstein? It's wonderful. Imagine what life would be like if we all found our 'missing piece.'

It was a missing piece.
And it was not happy.
So it set off in search
Of its missing peice.
And as it rolled
it sang this song--
"Oh I'm lookin' for my missin' piece
I'm lookin' for my missin' piece
Hi-dee-ho, here I go
Lookin' for my missin' piece."