A ukulele, however hard it tries,
Will always be small.
A ukulele is petite. a ukulele is young,
a ukulele is weensy, however.

The sax is not vocal!
the sax is exceptionally implemental.
Down, down, down into the darkness of the sax,
Gently it goes - the vocal, the implemental, the helpful.

Vocals, however hard they try,
Will always be wooly.
Vocals are woolly-headed. vocals are hirsute,
vocals are muddled, however.