This set has 121 plastic connecting blocks representing 2,200 units (1 cubic centimeter each). They're used to teach the base ten concepts, the decimal system, area, volume, and basic mathematical operations. They also develop skills in spatial intelligence and fine motor skills.Details:Visual and hands-on math learningDurable plastic for long-term use and easy cleaningFor ages 4 and upContents:1 plastic storage box1 10-cm cube5 activity cards10 squares10 rods100 1-cm cubes