This game has an addictive quality to say the least. Using foresight and battling an opponent that never makes the wrong choice, you have the advantage in that if you don't miss, you'll win- but if you do, it's likely game over. The spins move each piece around by two steps, with the exception of the first step, which moves it three steps. It's time to revive the shell games people, and what better way than to make it competitive! Memory- track the pebbles, Awareness- Know what symbols will be where, and most importantly; never take your eyes off the ball.. balls... the circles!