Koplow Games Classroom dice set will answer the need for math manipulatives and challenge the mind! Includes a combination of dice sets including polyhedrals, fractions, whole numbers, positives and negatives, operators and symbols to make equations. Each set includes 31 dice. Plastic construction. Assorted colors. For ages 5+ years/Grades K+. WARNING: Small parts not intended for children under 3 years of age.