Beautiful smooth solid beechwood nesting triangles in the seven colours of the rainbow, with a natural finish to show the grain of the wood. The inner block is a solid 3D triangle. Ideal for construction and imaginative play: to build towers and design rooms or outdoor areas for filling with small world play people or animals; applying mathematical logic to sort counters by colour or size; learning the geometric properties of triangles; exploring size and scale; using mathematical terms - larger, smaller, taller, steeper etc; and improving language skills and broadening vocabulary to describe their activities in action. Size: approx. 20mm – 148mm high. Heights: 19mm, 40mm, 61mm, 82mm, 103mm, 126mm and 148mm. Sides: 29mm, 59mm, 89mm, 119mm, 149mm, 179mm and 209mm. Lengths: 36mm, 79mm, 123mm, 164mm, 207mm, 251mm and 292mm. Wall thickness 8mm x width 40mm.