ETA hand2mind Plastic Rainbow Fraction Tower Linking Cubes with Fractions Only (Set of 51) Set of 51 (whole, halves, thirds, fourths, fifths, sixths, eighths, tenths, and twelfths) 9 colors represent 9 values of fractions Fractions are embossed on one side, the other 3 sides are blank Largest linking cube measures 4 3/4-inch by 3/4-inch square Grades 3-6