| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a conventional toy formed by filling a cylindrical container with colored water or lame film pieces makes a user feel bored because of the monotonous changes, is not good in terms of the vividness of the color, and gives fewer educational effects because of the lack of the application of scientific phenomena. SOLUTION: An indicator solution changing the color depending on pH of the aqueous solution is poured into a thin and long, transparent cylindrical container which has both ends or either end to be opened or closed and prevents the inside aqueous solution from being mixed easily. An acidic or alkaline aqueous solution is dropped into the container. The pH of the content solution gradually changes in the container, and a plurality of colors corresponding to the pH are produced. A toy makes the user enjoy the change of the color through the passage of time, shaking, or mixing. As a result, the user enjoys the toy changing the color distribution with time and interior accessories by seeing the vivid color and complicated changes of the colors. The acidic or alkaline aqueous solution is put in a dropper shaped container and is attached to the container in advance. An acid/alkali floats easily when mixed with a water-soluble light solvent, and is made by electrolysis of an electrolyte. The phenomenon gives the effect to let children to know about scientific phenomena such as mixture of colors, the concept of pH, and electrolysis. COPYRIGHT: (C)2005,JPO&NCIPI
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