Paint grenade

A liquid grenade 10 comprises an area 12 for storing liquid, an aperture arrangement 13, through which liquid from the area 12 for storing liquid can be ejected from the grenade 10 and an ejection system 18, to eject liquid out of the grenade, through the aperture arrangement 13. At least one movable blocking arrangement 20 is movable from a blocking position to a non-blocking position. In the blocking position, the at least one movable blocking arrangement 20 blocks liquid from exiting the grenade 10 through the aperture arrangement 13. In the non-blocking position, the at least one movable blocking arrangement 20 does not block liquid from exiting the grenade through the aperture arrangement 13. The liquid may be paint.