Water fight help???

I know it's early but in the summer I'm wanting to have a water fight. Can anyone think of good weapons???? They don't have to be just water though, think of it mais as a capture the flag thing. So stuff like Nerf, lasertag and that is gud too. Oh and if you can can think of anything homemade then could you tell me how to do it??? Thank u!!!!

Oh, and nothing dangerous either!!!!!