Hi wildbill014,
We understand you'd like to use two separate Apple Music accounts on one device. Currently the feature is not possible. There can be only one Apple ID account signed into Apple Music at a time. Try the steps and article below for creating a playlist just for the kids.
- "Open the Apple Music app.
2.At the bottom of your screen, tap Library.
3.Tap Playlists.
4.Tap New Playlist.
5.Give your playlist a name, then tap Add Music.
6.Find the music that you want to add.
On iPhone or iPod touch, tap the music you want, then tap Done. If you add music directly from the search box, hit Cancel, then tap Done.
On Android, tap the music you want to add, then tap Done The checkmark icon on Android" .
How to make a playlist in the Apple Music app
Have a good day.