I've saved you the time of searching through the vast number of songs in the store by including them here in a playlist. (babysleepforme.com)
These stations don't have ads, and you can skip an unlimited number of songs as you listen. (support.apple.com)
You can customize which tracks you want to listen to, though the relatively limited number of songs means you probably will get tired of hearing the same ones over and over. (newgamenetwork.com)