A few months ago, I came across this really cool tic-tac-toe game. I had planned to reproduce it for Arin. Last week we took a walk and found several stones. Once, we got them home, I realized that I didn't have the red, yellow and black paints that we would have needed to make a copy of their game, so we went with the more traditional x's and o's for our pieces. We gathered 18 stones.