There was a puppet movie I used to watch when I was little. There were these trolls (I think they were trolls) that lived in a tree and ran an FM radio station. One of the younger trolls was afraid of the dark. Somewhere in the movie one of the characters goes to a cave where the sun doesn't shine and there's some evil person there (I think he/she melts when the sun shines in the cave). There was a talking train, and at the end of the movie they sing the song "Love Train".

Anyone know the name of it?

It must be this: Trollies Musical Adventure (http://www.youtube.com/watch?v=LWbD_ZuZ7IQ&feature=channel).

It must be this: Trollies Musical Adventure (http://www.youtube.com/watch?v=LWbD_ZuZ7IQ&feature=channel).

OH! That's it! Thank you so much.