Here you have a very interesting idea I have found for Christmas. In the week before Christmas we have the last days of class previous to the Christmas holidays.
I think is a good way of practising vocabulary and have fun with a game. I am thinking of preparing some pictures for the vocabulary, laminate them and involvie some of the students to hide them for the classroom, for the others have to find them. This can be made by different teams repeated times in order to change the role of all the teams.
You have the original idea forthe game here in this link: