CWJ stands for Creative Writing Journal. Sometimes where I work, we have a Creative Writing Drill. Sometimes our writing cue is a thing like, "Best Vacation Ever." Other times, we bring out a flip chart that gives us a random setting, character, and plot.

This time the cue was:    
Setting: A magic Forest
Character: A talking dog
Plot: A character finds a magic wand

This one was a collaboration. It was written in one session with 5(?) different writers each with 5 minutes to continue the story. One restriction for this was that as many as possible of the three things needed to be mentioned by the first person. Any that were missed were supposed to be included by the second. It must start with "Once upon a time..." and end with "... and they all lived happily ever after."