I give each student a colored pen and tell them to write their name in big letters in the middle of a folded A4 size paper (so as to form a big name tag). Also, on each corner of the paper they have to write things that are important to them; it could be a name of a place/ someone, number of something, etc.  Students then have to guess what each word or number represents by asking questions, i.e. For #10, a student may ask:”Do you have 10 cats?”, and the student can only respond by saying ‘yes’ or ‘no’. For some students, it would be embarrassing to stand  in front of the class when they do not know their classmates well, so I would ask volunteers to do it from where they sit. After a couple of examples, students are then to do the same in two groups (As we have classes not more than 22 students, I have them do it in groups of 5 ). When they finish, I ask them to put their name tags on their desks so that I can address them by their names.