Games: A new variation on myster box and twenty questions

This is a new variation on the mystery box idea. Whenever I teach this activity I have difficulty getting students to volunteer to come up and put their hand in the box and try to get the rest of the class to guess what it is. So what I do is let the students pass the box around and play some upbeat music. When you stop playing the music the student with the box has to put their hand in the box and describe the object. You can do the same thing with 20 questions just put names of celebrities in the box