Yep, another identify this movie thread.
its a French movie, though released with English subtitles (and maybe english dubbing). I thought it was called “Les Enfants” but a serach on IMDB revealed nothing. Its a surreal, artsy movie about a kid who enters a (rather bizzare) dream world. I think it came out in the late 80s or early 90s.
As noted, I could’ve sworn it was called “Les Enfants” but none of the searches on IMDB turned out to be the movie in question.