Listen, kids dress up to to what they want deep inside, if your kid wants to dress up as a disney character…that means he’s probobly way over in gashmiyus.
I’m just saying, the little boy/girl who comes home saying “I want to be a tzadik/esther” is who they want to follow after.
If your kid is a tzadik, you can use this oppurtunity to make him feel more special. “Wow, your such a tzadik!!! You’re gonna grow up and be a rebbe….” and so on.
What do Disney characters show?