My favorite one is at the end.

A skunk sat on a stump and thunk the stump stunk, but the stump thunk the skunk stunk.

Peter Piper picked a peck of pickled peppers. Did Peter Piper pick a peck of pickled peppers? If Peter Piper picked a peck of pickled peppers, where’s the peck of pickled peppers Peter Piper picked?

Betty Botter had some butter,
But,” she said, “this butter’s bitter.
If I bake this bitter butter,
it would 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 baked it in her batter,
and the batter was not bitter.
So it was better Betty Botter
bought a bit of better butter.

Six thick thistle sticks. Six thick thistles stick.

A big black bug bit a big black bear, made the big black bear bleed blood.

The sixth sick sheik’s sixth sheep’s sick.

Pope Sixtus VI’s six texts.

She sells sea shells by the sea shore.
The shells she sells are surely seashells.
So if she sells shells on the seashore,
I’m sure she sells seashore shells.

Surely Sylvia swims!” shrieked Sammy, surprised.
Someone should show Sylvia some strokes so she shall not sink.”

Shy Shelly says she shall sew sheets.

Sam’s shop stocks short spotted socks.

A flea and a fly flew up in a flue.
Said the flea, “Let us fly!”
Said the fly, “Let us flee!”
So they flew through a flaw in the flue.

Which wristwatches are Swiss wristwatches?

Lesser leather never weathered wetter weather better.

A bitter biting bittern
Bit a better brother bittern,
And the bitter better bittern
Bit the bitter biter back.
And the bitter bittern, bitten,
By the better bitten bittern,
Said “I’m a bitter biter bit, alack!”

Mr. See owned a saw.
And Mr. Soar owned a seesaw.
Now See’s saw sawed Soar’s seesaw
Before Soar saw See,
Which made Soar sore.
Had Soar seen See’s saw
Before See sawed Soar’s seesaw,
See’s saw would not have sawed
Soar’s seesaw.
So See’s saw sawed Soar’s seesaw.
But it was sad to see Soar so sore
Just because See’s saw sawed
Soar’s seesaw!

The boot black bought the black boot back.

How much wood would a woodchuck chuck
if a woodchuck could chuck wood?
He would chuck, he would, as much as he could,
and chuck as much wood as a woodchuck would
if a woodchuck could chuck wood.

We surely shall see the sun shine soon.

Which witch wished which wicked wish?

Silly Sally swiftly shooed seven silly sheep.
The seven silly sheep Silly Sally shooed
shilly-shallied south.
These sheep shouldn’t sleep in a shack;
sheep should sleep in a shed.

If Stu chews shoes, should Stu choose the shoes he chews?

Give papa a cup of proper coffee in a copper coffee cup.

Six sharp smart sharks.

What a shame such a shapely sash should such shabby stitches show.

Sure the ship’s shipshape, sir.