Reorganize order of children?

I’ve been googling and can’t seem to find an answer…

How do I reorder children in a parent? If I drag a child underneath another, I’ll get a blue line that makes it seem like it’s going to place it underneath, but when I let go, nothing happens…

Presently, you can’t; children are always ordered alphabetically.

You could try altering the names of things to force them into a particular order, e.g. by putting an underscore at the beginning of the name.