Three movies/shows from 70's or 80's
Lately I have been updating my Amazon wish list with movies from my past and there are a few I can think about but have no clue what they are called.
The first is an animated cartoon that might have been from the 70's but I saw it in the 80's when I was growing up. There were these wood sprites/fairies and a tree. I think it was a willow tree? The tree was dying or someone was stealing energy from it? It was a very dark show. There was one creepy character.
The second was a movie that had little kids playing adult roles. Like it was a detective movie but instead of adults playing a 30 year old person it was a little kid playing that 30 year old person. That's all I remember.
The last one had a young boy as the main character. It was not animated. I want to say something was going to be torn down and it was up to the boy to stop it. He ended up traveling to another realm or something but I remember that the "destruction" was also going to affect this place. I remember there was a troll under a bridge that they boy had to outsmart.
I would appreciate any help you can give me. Thanks!