Children can explore the behaviors of light and colour through the geometric pieces in the Light and Colour Geo Set. The smooth, transparent pieces made from solid acrylic are sized just right for little hands. Recognizable shapes that fit together enhance building activities and encourage the development of simple math skills like pattern building and size relationships. Combine with other Light and Colour sets to expand the possibilities for meaningful play. Rectangle Prisms measure: 4cm W x 4cm D x 8cm H (1-1/2” W x 1-1/2” D x 3” H).