Rainbow Architect Rectangles are beautiful smooth solid beechwood nesting rectangles 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 rectangle.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. Lengths: 114mm 132mm 150mm 168mm 186mm 204mm and 222mm. Wall thickness 8mm x Width 40mm.Age Suitability: 12 months+