Korolevstvo krivykh zerkal

The Kingdom of Crooked Mirrors uses the rather over-used mirror portal to a different world, but adds it's own idea to it with using it to show the other side of the human character. Furthermore it gives children a simple insight into the backstabby ways of politics too.

Obviously there will always be some little plot holes in a movie like this, or other story related things that could've done with a little more explanation, but overall it's a movie with a very nice flow to it that keeps you entertained until the end. And that, compared to similar movies from the same era, features a surprisingly low amount of in-the-face soviet propaganda.