Abstract: An instructional toy (10) adapted to instruct young children by association. Colored three-dimensional overlays (30) correspond to printed matter (36) on rigid pages (12-22). The rigid page is of a slightly different shade of the color of the overlay for visual distinction between them when the overlay is properly positioned. Means (32 and 34) for supporting overlays in singular positions over the printed matter (36) are provided in such a manner that each overlay lockingly engages with only one corresponding printed matter (36) on one page. Multiple pages (12, 14, 16, 18, 20, 22) are printed of various colors such that the page between pages of primary color indicate the color resulting from a mixture of those primary colors. While the invention is useful in teaching the young pupil, it can also be of value in the teaching of slow learners and adults with learning difficulties.