-If player tossing the "grenade" hits the opposing player with the balloon and it bursts open on them, the team that tossed the "grenade" gets 3 points.
-If player tossing the "grenade" hits the opposing player but the balloon doesn't burst open, the team that tossed the "grenade" gets 2 points.
-If player tossing the "grenade" misses opposing player but the balloon splatters and gets the opposing player wet, the team that tossed the "grenade" gets 1 point.
-Nothing else scores.
Keep the distance far enough so as to make it a challenge, but close enough that people are actually getting wet...after all, isn't that really the point of water balloon games?
As always, add your own rules as you wish. Let us know how it goes for your group, or send us questions or suggestions in the comments below.