Here’s a quick activity that might be great for the festive season. It comes from a lecture by Matt Abrahams, a lecturer at the Stanford Graduate School of Business who teaches strategic communication.
In this activity, the learners work in pairs. They give each other imaginary boxes with gifts. They don’t say what’s in the box. The person who got the gift ‘opens’ the box, looks inside and says what they see. They should say the first thing that comes to mind. Then the gift giver should improvise to explain why they thought the gift receiver needed this gift.
This is the video extract in which Matt Abrahams explains the activity: (26:00 till 29:00)
You could get your learners to watch the video or, if you’re pressed for time or if your learners would find a three minute authentic extract difficult to follow, explain the activity yourself.
I’ve also written an editable worksheet to go with the activity and a Slideshare pdf document if you don’t have Microsoft Word:
Olya Sergeeva's ELT blog 
Creative activities are truly enjoyable. I really like them. I’ll try to do this activity but I’m going to modify it. First students write on small pieces of paper random nouns, and then the exercise will be explained. Students draw lots with the nouns they have written.