32 Fun DIY Backyard Games To Play (for kids & adults!) this has some of the best outdoor ideas I've ever seen. Will be trying ladder bean bag toss and sidewalk/box board 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!