| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an educational toy of high gaming nature by which one can learn the magnetic property. Ž<P>SOLUTION: A cylinder magnet (1) is inserted into a hole, which is framed (2) with an approximate same diameter of that of a cylinder magnet (1), prepared in a ring type magnet (3), and, at the same time, is pressed down by the delicate repulsive force of two or more ball magnetic substances (4) so that a cylinder magnet may not jump out. As the ball magnetic substance (4) is taken out one by one, the repulsive force which is pressing the cylinder magnet (1) becomes weaker and at a certain time the cylinder magnet (1) jumps out. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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