There are lots of these. A few come to mind right away like Narnia, and Lord of the Rings.
Lord of the Rings would require your children to be old enough not to be too afraid to sleep after seeing it. If they can realize that it is fantasy with a true and everlasting message, then they are old enough. I am thinking roughly 10 or so with adults present.
Star Wars is similar but probably younger children could watch it with adults present to explain and comfort when necessary. Actually Star Wars is much tamer than Lord of the Rings. The creatures in Lord of the Rings look like they walked straight out of the pit of hell. I have not noticed any dolls made of them!
Amazing Grace is a movie based on the actual life of William Wilberforce who spent his life trying to abolish the slave trade in England. The song, "Amazing Grace" was written by John Newton, who WAS a slave trader and upon conversion to Christianity the whole rest of his life he felt the burden of the many lives whose death he was responsible for.