27 painted wooden cubes in a wooden box with a lid. The box is hinged and opens out to display the cubes. The lid is printed with the trinomial square pattern. The box include: - Three wooden cubes: red, blue, and yellow. - Eighteen square based prisms. 3 red and black, the same height as the blue cube. 3 red and black, the same height as the yellow cube. 3 yellow and black, the same height as the red cube. 3 yellow and black, the same height as the blue cube. 3 blue and black, the same height as the yellow cube. 3 blue and black, the same height as the red prism. - Six black rectangular based prisms, whose 3 dimensions correspond to the edge of the red, blue, and yellow cubes. - Three wooden cubes: red, blue, and yellow. All the pieces, once assembled, form a cube of a trinomial (a+b+c)3 The square of the trinomial is painted on the lid. Purpose: To develop visual sense of color and shape. Preparation for mathematics: the cube of the trinomial. Introduction for algebra and preparation for the proof of the formula (a+b+c)3 at Elementary Level.
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