Can you suggest example sentences where changing the case of one noun keeps the sentence grammatical but changes meaning? Preferably a noun in the same sentence could be used in all five main cases (or as many as possible). I want to have an illuminating example or two to make the point that case is crucially important in Latin.
I am looking for such examples for a couple of purposes: teaching, fun and talking about Latin to friends. I have given an example answer below to give a better idea of what I want to see.