DO AS I MEANT NOT AS I SAY

We had finished an art project in the classroom. One of the boys was fascinated with the one hole punch and there was little circles all over the floor. I said,"Freddy, get thosse circles on the floor for the janitor, please." A few minutes later I glanced over and noted Freddy cheerfully hole punching circles all over the floor. "What are you doing?" I shrieked, none too professionally. Poor Freddy looked up in astonishment and said "you told me to get those circles on the floor for the janitor!" I had indeed.