Dice is a game tool or gambling tool. In ancient times, it was a three-dimensional small block made of bones, wood, etc., with six sides carved with one, two, three, four, five, and six dots. In some places, it is called dice. In theory, the probability of each side facing upwards after a uniformly shaped chromon is thrown is equal. Nowadays, it is generally used for activities such as mahjong and board games.