Arthur thinks his pen pal is more fun than his little sister. Little sisters don''t do things like karate and wrestling -- or do they? It takes a surprise letter to show Arthur that sometimes there''s more to sisters -- and pen pals -- than meets the eye!

Arthur thinks his pen pal is more fun than his little sister. Little sisters don''t do things like karate and wrestling -- or do they? It takes a surprise letter to show Arthur that sometimes there''s more to sisters -- and pen pals -- than meets the eye!