Make a backyard bowling alley. Add food coloring to clear plastic bottles of water. Use party streamers as lane margins. Add glow sticks for night bowling. (These would make great outdoor table nightlights also with the glowsticks, gonna try it!
Pinner says, "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!