Abstract: A portable base frame with a lid contains a set of 49 cubes, each cube having a different primary or secondary color on each different face thereof. Twenty-five of the cubes have one black face, and twenty-four have one white face, but none have both a black and a white face. The cubes rest on a framed board area with an odd number of spaces designated thereon for deposit of the cubes thereon, one in each space. Each of the spaces has an aperture under the cube to facilitate pushing the cube up from under the board. The base has foldable legs with a resilient band normally keeping each leg toward the folded position. With the lid removed, the cubes can be arranged in various patterns for different lessons or visual effects.