UNO Dice uses the same colours, numbers, and directions as the card game. To start, players take 5 dice to make their hand which is left visible to the other players. One die is rolled in the centre. On each turn, the players examine their dice without rolling them. If a play can be made by matching the center dice in number or color, then the dice are exchanged and the centre die is placed back in the bag. If a play can not be made, then the dice in the player's hand are rolled. If a play still can not be made, then a new die is added to the player's hand.The International Games version has two additional variants Game 2 is a Yacht/Yahtzee variant. Game 3 has players making scoring chains. The components are 24 fairly crude wooden dice, a plastic tray and a plastic draw bag and a printed score pad.The Mattel version has 25 colorful plastic dice matching the style of the card game. It also includes a black cloth drawstring bag to keep the dice together. - BoardGameGeek