With a connector on all 6 faces, Omnifix Cubes are joined in any direction to create rods and blocks or geometric and abstract forms. Students snap flat shapes together to form a permanent cube which can then be joined to other cubes. Ideal for exploring spatial relationships, number bases, fractions, cubed numbers, tessellations, and more! Omnifix Cubes come in four brilliant colors and measure 2 cm (3/4") each. Omnifix Cubes can be used with any math curriculum that specifies linking cubes. This kit includes a 3D Problem Sloving books, 500 cubes and a small teaching guide. .