I thought that this video from the YouTube channel Rob Plays about the creation of the "Childrens' Radio" format was pretty interesting.
https://www.youtube.com/watch?v=Mfb8BOMG1yQ
https://www.youtube.com/watch?v=Mfb8BOMG1yQ
Radio Disney is not much of a name that you see about in radio anymore, since they are online only
One thing that I noticed in one of the newspaper articles shown in the video mentions that the Radio AAHS affilate, in Kansas City, MO, was KCNW (1380AM.), it actually was what was at the time, KCAZ (1480AM - Now Regional Mexican station KCZZ.). I think whoever wrote the article had got the frequencies (Or callsigns.) mixed up.
http://kcradio.robzerwekh.com/1380.html
http://kcradio.robzerwekh.com/1480.html