Koplow Games 12-Sided double dice game (die within a die) 24 mm transparent 12 sided die with a mini 12 sided die inside. Dice helps to understand basic math functions, practice basic math functions, create multiplication tables 1 to 12 randomly, and enhance games and activities. Ideal for ages 6 or above and grades 2 and above. Warning: Choking hazard, small parts, not for children under 3 years. Each individual set contains 6 Dice, Bundle of 6 sets, 36 Dice total.