Tongue Twisters - maybe it's better not to have a tongue?

A flea and a fly flew up in a flue.
Said the fly to the flea, "What shall we do?"
Said the flea, "Let us fly!"
Said the fly, "Let us flee!"
So they flew through a flaw in the flue.

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?

Six slippery snails slid slowly seaward.

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