Big brother Arthur's got a doozie of a dare for sassy little sister D.W.: Can she try to be PERFECT for one whole day? From the do's and don'ts of eating and etiquette to earning A's for best behaviour, good manners are great fun when D.W. is your cheerful guide. she becomes polite, obedient, and tidy. She makes her bed, says hello at school (nobody likes a grouch, so smile a little!), shares and gleefully obeys her parents' every request.
The young aardvark addresses her readers directly, bringing up points as she goes through a typical day filled with familiar tasks. There are a few snicker moments, such as, If I sneeze, burp, or fart, I just say 'Excuse me, please.' and the final page asks the readers: Are you perfect yet?