Students make pairs and try to make long sentences with infinitives according to the situation. One word = 1 point.
After finishing one question, they will bring their worksheets to you to check. Only after checking and adjusting any english errors, then you can count their points and write it in that question`s score box.
After all questions, or if the time runs out, students with the highest number of points can get a prize.
You can adjust the rules, for example they can only use the word "and" once, or they can`t repeat any words etc.