I built a bar for her to learn her kip on. I don't think it helped her learn her kip, and probably contributed to the awful muscle up form she started with, but we had fun playing with it, she would get so close to a kip ask me to record her "first kip" thinking the next attempt will be her first, not get it, but laugh about how close she would get. She cried when I took it apart as it was clear she had outgrown it and kept doing things on it that were too dangerous.
Built her a floor beam as well, she still uses it to practice handstands on and watch youtube upside down.