Hi everybody! What's the best way to get small black and white stones for marking Koans? Wy wife got some glass "stones" from Williamsburg Pottery, but they are twice the size I'd want them, and they aren't opaque. I'd like some like the ones in the boxed Zendo. And I've eaten all my Christmas M&Ms (green for true, red for false, works well, but they only sell those at Christmastime) Topher