Radio Player - streams available


I am based in Ireland an am doing a brief (8 week) course on App Inventor to some 16yr old students.

I want to do a lesson building a radio app - I have done this before with success (many years back) offering up 1 radio station (a national Irish one)

But i figured for the more advanced / differentiation it would be cool if i could offer multipl e- ie UK, American, Rock, Pop stations etc.

I have been reading around the fact that some streams no longer work, so I my question is,

Does anyone know of a good source of streams that work to give choice

Thank you.