This animated series is based on Marc Brown's best-selling books about Arthur Read, an eight-year-old aardvark, his sister D.W., and their f amily and friends. Arthur wants to prove to his parents that he's resp onsible, but gets more than he bargained for when opening "Arthur's Pe t Business." Arthur is upset that D.W. doesn't share his tastes, but i n "D.W. the Copycat," he finds that sometimes that's for the best.