Play Choir online For FREE! - Choir - See The Jelly-Mouth Choir Sing! Choir is a wonderfully weird little musical play toy that allows you to make a quartet of rubbery mouths sing by dragging the bottom lip of the lead singer in different directions. It’s a very simple and silly little experience that’s a joy to play around with. Sure, you won’t make any music that sounds remotely good, but you will have a lot of fun!