Balloon Poppers

Requirements:

Inflate one balloon for each Scout and attach a length of string to it. Now tie the balloon to the ankle of each Scout as shown in the diagram below. When you start the game each Scout has to pop everybody's balloon by stamping on it. The winner is the Scout whose balloon is NOT popped.
Once a Scouts balloon has been popped that Scout is out and must not interfere with the rest of the game. To speed up the game then you can keep reducing the boundaries of where the Scouts can run to.