Shiho Ide did this activity with us in English for Activists. It worked well -- everyone was able to create and share several sentences in a short time. The idea is simple: write sentences of six words. They can be free or in response to a prompt. You can pair up to do a dialogue or debate. You can string several sentences together to make a narrative, poem, or song. You can do an improvised dialogue with every sentence being six words. You can write collaboratively, each person adding a word. You can add other structures, like blues, etc.