Help students make connections in math with these colorful, engaging manipulatives. Plastic rods snap together to clarify addition, subtraction, multiplication, division, fractions, decimals, geometry, measurement, patterns, algebra and probability concepts in a visual and tactile way. Connecting feature makes manipulation and demonstration easier. Rods are marked in 1 - cm increments on one side. Small Group Set contains 155 durable rods for use with 4 - 6 students, Activity Guide and convenient storage tray. WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.