A relay race where you must keep the balloon in the air while racing back and forth across the room.
Balloons filled with air
Divide up into teams with one balloon for each team. Half of each team is at opposite ends of the room at least 20 feet apart. The first player of each team must keep the balloon in the air while racing down to the other end. She passes the balloon off to the first player of her team at that end who races back, and passes it off to the next, etc. To be declared the winning team, all members of the team must have successfully raced with the balloon in the air.
Make sure the balloons are Halloween colors!