This activity has the motivational element of students not knowing exactly what the entire composition they help write will look like. The results are often funny and can generate a lot of speaking.
Give a piece of paper to each student. An instruction is then read to the students who must write down from their own experience or imagination the result of that instruction. The student then folds over the top of the page to cover the line they have written and then they pass it to the person on their left. The next instruction is then read by the teacher and the students write down the result, fold it over and pass it round again. Eventually, the piece of paper will end up with the person who first wrote on it. Students then open the paper and read the complete 'story'.
As an alternative, the teacher dictates small parts of a story and then the student completes the descriptions the teacher leaves out. The student then passes the paper to the person next to them who doesn't turn it over, but continues the dictation and then supplies another missing part.
Here's an example:
"One day a young boy went to? where did he go? Pass the paper round?
He crossed the street and saw a? what did he see?? who was dressed?How was he/she/it dressed?? Pass the paper round?" and so on.