FINALLY A PIN THAT WORKED AND WAS AWESOME!! Take a 2 liter soda bottle, and poke holes in it. Hook your hose up to it, toss over a tree branch (we made our own since no good branches nearby) and turn on the water!
would be fun to do as a relay. The first kid starts with a full cup of water, then pours it over his head and the second kid catches it and repeats and they keep doing this to see who can fill up a jar the fastest