Koplow Games double dice, a die inside of a die, is great for math games! Roll it and add, subtract, multiply or divide the numbers. A great way to practice basic math skills and enhance games and activities. Each pack includes 8 dice in assorted colors. Sold as 10 packs for a total of 80 dice. Ideal for ages 5 and up. Warning choking hazard: Small parts, not for children under 3 years.