Koplow Games Jumbo polyhedral dice game is effective method of developing math reasoning and computation skills. Ideal for ages 10 - 13 and grades 4th - 8th. Assorted colors. Set includes (1) each 4-sided, 6-sided, 8-sided, 12-sided, 20-sided and (2) 10-sided dice. Aid in teaching addition, subtraction, multiplication, division, fractions and percentages. Warning choking hazard: Small parts, not for children under 3 years. Bundle of 2 Jumbo Polyhedral Dice Sets.