Bill Cosby is a character voiced, looks and is based on his creator, Bill Cosby;He is athletic. He plays the drums with trashcans and spoons. He is the older brother of Russell Cosby. Like Fat Albert, Bill is usually the voice of reason in the gang, although at times a little more stubborn. As the older brother of Russell, he is often trying to keep his little brother Russell out of trouble - though not always successfully.