Bluey and Bingo's cousin Muffin sings nursery rhymes Humpty Dumpty and Twinkle Twinkle.Bluey and Bingo's cousin Muffin sings nursery rhymes Humpty Dumpty and Twinkle Twinkle.Bluey and Bingo's cousin Muffin sings nursery rhymes Humpty Dumpty and Twinkle Twinkle.