Playing with water in the yard, we’ve a real dearth of offensive weapons. Actually we just have the one, the hose. So one person gets the hose and the other people…. get really wet. I cogitated on this problem, looked around the back yard, and literally with a little duct tape, the water table lid, and some PVC pipe, came up with some defense: The water shield.
Which works well enough to let the user get close to the hose-sprayer and dump a bucket of water on the sprayer, although ultimately everyone gets wet, which is, of course, the whole point.