I don't have any kids of my own, however, I did babysit for a while for a fellow who was somewhere on the transmasculine spectrum but was either pre-transition or some flavor of non-transitional genderqueer person. I didn't pry for the specifics, since I was there to watch his kid, not interview him about his life.
His wife and daughter referred to him as Daddy. His wife kind of alternated between male and female pronouns for him, depending on who she was talking to, which gave me the impression that he was out as a guy at home but not so much to the rest of the world. They were very open about it with their kid. They talked about how Daddy is a "boygirl" (their term-- feel free to choose your own kid-friendly explanation of being trans if you go a similar route). The result was a very open-minded kid, who I'm sure would not bat an eye if her Daddy ever decided to move forward with his transition. It seemed like a pretty effective strategy for someone who can't transition publically yet for whatever reason (health, job, etc.), but wants to prepare kids for the eventual probability.
