Fantasia (1940), as a mostly plotless experiment, defies easy description, and the fact that it was made 80+ years ago, when sensibilities were substantially different from today, and the experiential base in the area of animation far smaller, than today’s audiences’.
Think No Frozen (2013).
It might be best considered as eight experiments in mixing music with animation, and sometimes a bit of live action, as vignettes. It’s fun, it’s thought-provoking.
It’s even scary.
There’s good reason Fantasia is considered a classic, and that’s not confined to chronological origin. It’s a master class in telling stories through movement. Recommended.