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The Spectra and Prismatic prism sets contain a variety of brightly colored hardwood prisms and hand-polished acrylic prisms that fit into rectangular, triangular, and square boxes. Children create simple and complex designs that help them think about order, pattern, and symmetry. Children also experience the beauty and wonder of the color spectrum when light refracts through the acrylic prisms that form part of their inventive buildings and designs. All sets include suggestions for use.