Playable kids are in, though extremely rough still of course. First nude textures are in dev right now.
Only so much, textures and maps only really, that can be done right now until the new NIF structure is supported by the editing tools. But that's being worked on too.
For basic nudity, and a playable race, you won't have to wait for the official tools to be released. For a well rounded mod with remeshed armor and updated models, that's gonna be a while but not as long as it took for Skyrim.