Learning Resources MathLink Cubes - Set of 1000 Cubes Kids can build and explore spatial relationships with these linking cubes|Builds counting, sorting, and measuring skills|Also good for graphing|Cubes link together on all sides and are compatible with other linking cubes|Perfect for Grades K and up Build knowledge of spatial relationships with this set of 1000 Plastic 3/4" cubes in 10 colors. Cubes feature geometric shape cut-outs for more complex patterning activities.