Everyone tucks a piece of scrap material in the back of their trousers so it is hanging out like a tail. Next set a boundary for the game. In this game, everyone is out for themselves and trying to steal as many tails as possible. Participants are not allowed to hold on to their own tail. There must be a sufficient amount of material hanging out so that others can grab it. Once someone wins a tail they must tuck it into your trousers. At the end of the game the winner is the person with the most tails.
NB: you will need enough bits of scrap material for everyone (sports bibs work well).