There’s a piece by Daniel Pinkham, in 7 movements, called Company at the Cresche. It’s for two part treble voices(Soprano and alto) with harp, organ, and handbells. It’s a lovely small piece, I think less than 10 minutes. Maybe you could get some adult women to sing with them, and add a little electronic keyboard. I think the bell part can be played on glockenspiel.