Linking kids apple music account to Alexa

Asking this question again, because it was never actually answered. The answer given in the last page (below) is just the instructions, which were followed. This question still applies, how do I add a child's Apple ID account to Alexa. I keep getting the "Link unsuccessful" anytime I attempt to add their account. BUT when I add my personal "adult" account, I have no issues. One of the things we are trying to do is have the public music filtered for explicit content. Alexa does that when you ask it to play an explicit song, BUT if Alexa is just playing a song, it uses the preferences and rules for Apple. That means random songs Apple selects will be the explicit version...

Old post: Linking kids apple music account to Alexa - Apple Community

Hello,

I'm trying to link my daughter's apple music account to her amazon echo and for some reason while trying to link it after putting her email and password it says link unsuccessful. I am not sure if there is a restriction because her account is for a kid.