I take a box or a sack and ask every student to put something in it ( a pen, a rubber, a small toy, etc). Then, you can close your eyes and take one thing out of the box without looking at it. The person whose thing has been chosen should tell some words about himself and  the thing. For example, I �m Julia, I �m 13, I �m optimistic and independent. This is my black pen. My best friend gave it to me some days ago. 

You don �t give the thing back, you put it on the table. When all your students (if the group is small) or a part of the students (if the group is big) finish the task, ask everybody to remember names and info about every person. For example, Do you remember whose pen is this? What else do you remember about her? ( it �s ok if they remember even only names :) ) Or you can take every thing and give back to the students saying "Thank you, Dan. Thank you, Mary....."