You will need thick straws (thin ones work too), small sheets of paper. Using straw players will need to suck the paper sheets and transfer them from one pile to another. Whoever does this first WINS the game.
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!