| 摘要 |
PURPOSE: A twelve piece puzzle set is provided to effectively improve ingenuity, perceptibility of space, as well as power of concentration and so on of children by enabling children to create various objects and letters. CONSTITUTION: A square(R) having a certain size is divided into two equal parts about a diagonal line(L1), divided about second cutting lines(L2,L3) as equal angles lines of a corner(C), divided along a third cutting line(L4) intersecting at right angles to the diagonal line so as to accord to sides(D,D') to which the second cutting lines reach, and divided along fourth horizontal and vertical cutting lines(L5,L6) to contact an intersection point of the diagonal line and the third cutting line, thereby producing twelve small figures(1,2,3,4,5,6,7,8,9,10,11,12).
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