Quiet Night, Quiet Game:
Hook and Ring- no batteries, no timers, no worries.
When I was in the Bahamas a while back, I saw this game at a beach-side bar and of course I fell in love with its simplicity. It's a ring on a string, with a hook as the target. The one I saw in the Bahamas had the hook on a post, which allowed for more complex tricks, but I couldn't wait until I was sitting around my finished house with the posts outside to play. I set it up in the yurt.