Koplow Games double dice, a die inside of a die. Great for math games! roll it and add, subtract, multiply or divide the numbers. Assorted colors. Ideal for ages 5 and up. A great way to practice basic math skills and enhance games and activities. Warning choking hazard: Small parts, not for children under 3 years. Each individual set contains 8 Double Dice, Bundle of 10 sets, 80 Double Dice total.