Ah, now that it's nearly September, kids are back in school and settling disputes on the playground in the time-honored tradition of rock, paper, scissors. Seattle's The Not-Its! have an instructional video for your kids (for "Rock, Paper, Scissors," off their excellent 2013 release KidQuake!) that illustrates the game.
Plus: bonus devil's rock sign. Thankfully, the contest doesn't go full Sharks-Jets.
The Not-Its! - "Rock, Paper, Scissors" [YouTube]