Karen's School Trip is the twenty-fourth book in the Baby-Sitters Little Sister series.
Back Cover SummaryEdit
Karen's class is studying wild animals. They are even going to see some at the zoo. Karen and her friends can't wait for their field trip.
But then the "mean green bug" hits Ms. Colman's class. Everyone is getting the flu! Karen hopes the school trip doesn't get canceled. But she doesn't want to give the animals the bug, too!