Answer: this is my fave alliteration poem:
Betty Botter bought some butter,
"But," she said, "the butter's bitter;
If I put it in my batter,
It will make my batter bitter;
But a bit of better butter,
That would make my batter better."
So she bought a bit of butter,
Better than her bitter butter,
And she put it in her batter,
And the batter was not bitter;
So it was better that Betty Botter
Bought a bit of better butter