Prepositions game--This would be a fun activity to help the kids to learn their prepositions. You move the two props around to represent prepositional phrases (above, behind, under, etc.). The kids might get loud during this activity, and you'd also have to bring the props.
Perfect for those days when you have 7 minutes left at the end of the period - quick, easy, fun, can be used for all levels, and easy to do in the target language. Would be great with a Smart Board, but will work without one too.