From the rules sheet: "Tension triumphs as two to six take turns tossing chips into the can... When you think the target number is reached, CALL IT! Dump out the chips and count 'em up - if you're below, you challenged too soon and you'll lose points - wait too long to challenge, and an opponent may take the round! Object: To guess when the sum of the numbered chips in the can equals or exceeds the target number announced by the first player in the round" contents: Can, 6 sets of chips numbered 1-10, score pad, pencil, rules.