Corx is a dexterity game played with two cork cylinders (basically wine-bottle corks, but precisely manufactured and with amusing characters painted on the sides -- this is where the 'collectible' aspect comes in, but other than the art every cork is the same). Players take turns dropping the corks onto the table, attempting to land them on their ends. A cork that lands with the red end up is worth one point, the black end up is worth 2 (because the black end is wider). The player who gets exactly 21 points first wins; if you go over 21, that turn is not scored.