Peter Peopler Picked a Plot to Pitch his Poppolin

"Peter Piper picked a peck of pickled peppers..." a nursery rhyme by Mother Goose.

Peter Piper picked a peck of pickled peppers;
A peck of pickled peppers Peter Piper picked;
If Peter Piper picked a peck of pickled peppers,
Where's the peck of pickled peppers Peter Piper picked?

This is an example of alliteration and is commonly known as a 'tongue twister'.

Plot: A small piece of ground, generally used for a specific purpose: a grave. Pitch: Also a piece of land marked out for sport.

Pied Piper of Hamelin (Poppolin?).