Do you hear?
Each person participating in the game is blindfolded.
A few leaders or other people are given something with which to make a noise (e.g. glass and spoon, 2 spoons, bouncing ball, books...).
Each blindfolded person is given a specific sound to listen for and the 'sounds' are then scattered randomly around the room (a large room or hall is best).
About 3 blindfolded people could go at a time and you could play elimination rounds, you can also have other sounds just to add as distractions.
First to their particular sound wins.