This may be overkill, but consider a used Squeezebox Radio and setting up Lyrion Music Server on your network. It uses your music library, along with optional web radio and streaming services. You can control any device from any computer in your network. The SB Radio has a great sound, even 15 years later. It has physical buttons so your kids can choose music without phone/computer. You can get a used Radio for like $30-$40 on eBay, and Lyrion is free and open source
LMS + Squeezelite would be my recommendation! Supports local music libraries, podcast subscriptions, last.fm, web radio, and streaming services! LMS would be the server which runs in the background, and Squeezelite would be the player software. Since LMS is a server, you can have other devices in your network use it too!
Also, I highly recommend the Material Skin. It’s not just gorgeous visually, but it adds so many extra useful UI features the stock skin doesn’t.
Visit us on the forums if you have any questions!
Mom, you just don’t get it! You don’t need a remote to look for the movies! You just gotta ssh into the streamer and run a MPV command! Stop calling every night saying you can’t find Happy Gilmore!