Real sunglasses can be used for templates. Frames can be elaborately decorated before colored cellophane is taped in for lenses. Students can experiment with all sorts of combinations of colors, although the traditional red and blue lenses have the greatest 3-D effect. Students can then view their watercolor paintings using their own glasses. Arrange the cellophane directly on the glass, so that colors overlap and create a collage.
Colors behave somewhat differently when mixed on a computer.
That is because light is being mixed instead of pigments. Show students this difference by printing a color copy of their digitized design. Compare the printed image with the one on the screen. Add designs and explore the use of various color palettes by opening the scan in any draw or paint program . Experiment with scanning various three-dimensional objects along with colored cellophane to produce even more elaborate art works.