Action fans heard! Now begins the ultimate nerf birthday. The rules of the game are simple: everyone brings a blaster to the party (or lends them one) and then the competition can start blue against orange . The 6 Nerf Battle Zone cardboard cups are printed with targets and dots and are ideal targets for zealous target shooting. It is best to choose the cups for the very first competition, because your friend and you should not shoot full cups of drink. The 200ml cups come in two different colors .