Rainbow Architect Squares are beautiful smooth solid beechwood nesting squares in the seven colours of the rainbow. They have a natural finish to show the grain of the wood with the inner block a solid 3D square.Ideal for construction and imaginative playGreat for exploring size and scale and using mathematical language - larger smaller taller steeperHeights: 40mm 58mm 76mm 94mm 112mm 130mm and 148mm. Wall thickness 8mm x width 40mm. Age Suitability: 12 months+