Movie about a boy and a rainbow

I have been trying to figure out this movie for years and it still bothers me… I swear it has something to do with a boy finding the end of the rainbow and finds an underwater world… It was the late 80’s early 90’s may have had Jim Henson type puppets… A glass elevator underwater?  Any ideas?

 

thank you

 

me

 

3 thoughts on “Movie about a boy and a rainbow

  1. I just went on YouTube and watched buts and pieces… Not the right movie this one was older more like a wonder works special possibly?

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