Rubber baby buggy bumpers.
She sells seashells by the seashore.
I scream, you scream, we all scream for ice cream!
Peter Piper picked a peck of pickled peppers.
Some small-time crooks decided that people were so stupid that they would accept 18 dollar bills if somebody gave then any. So they carefully made some plates and printed some up, and went to a small town to try them out. They got up to a shopkeeper and talked for a while, then casually said, «Say, can you give me change for an 18 dollar bill?»
«Sure» said the old shopkeeper. «What would you like, three 6’s or two 9’s?»