The basic idea of the game is that the first person starts off a sentence, another person finishes it and starts the first word or two of the next sentence. The hopeful result is an eventual story. Can be random or not! Just make it fun.
I’ll give one sentence to start with in addition to the beginning of the next sentence for anyone to finish (and then begin their own sentence!):
“Red Riding hood sighed, sounding incredibly exasperated as she did so. It was…”