I remember watching this movie from the late 80's or early 90's about a boy and girl who have a stuffed elephant and somehow the elephant and children go on an adventure riding a train. the train was a train set. they meet a farmer and a mare and they sing the old grey mare just ain't what she used to be and they meet a princess who can't decide what to wear and paper dolls. the elephant usually messes up things by knocking them over but in the end he saves them somehow. i can't remember the name of it for the life of me. can you help?