Six sick slick slim sycamore saplings

A box of biscuits, a batch of mixed biscuits

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?