For higher-level groups this can be really fun.
Each student adds a word to create a group story.
The teacher can begin by saying the first word and in a circle each student adds the next word, without repeating what has come beforehand.
Good starting words are 'Suddenly' or 'Yesterday' to force the story into the past tense.
It is great for highlighting word collocations and practising word order. The stories can develop in any number of ways. Some groups may need the teacher to provide punctuation and decide that the sentence should end and a new one should begin.