The Hint Game.  This game takes a little explaining.  Middle schoolers will get the idea from the directions and an example.  Younger/lower level students might need some extra practice.

Students make a line and the first person turns their back to the screen.  The next in line reads the question and makes a facial expression to hint at the answer, indicating either it's mine or it's not mine.  I played this with fourth grade, so they only learned "it's mine," not "they're mine."  When the guesser is finished replying, they go to the end of the line and the next student turns their back to the screen.  I gave them a minute time limit per round.  We played in two teams. 

They enjoyed it.