Double Dice-10 Sided, a unique die within a die. Features a clear outer die to help view the inner dice. Add new dimensions to math manipulatives with this 10 sided clear polyhedral die with colored 10 sided die enclosed. A hands-on product to reinforce essential math skills, practice basic math functions and enhance games and activities. Ideal for ages 6 - 11 and grades 3 and above. Warning choking hazard: Small parts, not for children under 3 years. Bundle of 30 Double Dice.