It's D.W.'s birthday and all she wants is Mary Moo Cow (purple with pink spots--not pink with purple spots ) But when Mary Moo Cow gets sick to her stomachs (cows have four, you know), D.W. thinks her party is ruined. But Arthur saves the day when he arrives--disguised as Mary Moo Cow

It's D.W.'s birthday and all she wants is Mary Moo Cow (purple with pink spots--not pink with purple spots ) But when Mary Moo Cow gets sick to her stomachs (cows have four, you know), D.W. thinks her party is ruined. But Arthur saves the day when he arrives--disguised as Mary Moo Cow