My child says a child with a disability is "weird" or "funny," or imitates them. How should I talk about it?

Rather than scolding head-on, first receive it—"why did you think that?"—then convey concretely that the behavior has a reason, and that imitating or teasing hurts the other person. Words like these often come from "not knowing," so use it as a chance to replace them with correct understanding.

For a child, you could say: "That movement of ○○'s has a reason. Being imitated makes them feel sad. If you find something puzzling, ask me."