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It is the dream of every family that let the child learn happily. The design of the flashlight is beneficial to develop the children’s sense of color. When they play with it they can understand some simple principles of light in nature.After the light irradiation different colored glass lens will emit different light. What color is it if we put two or three pieces together? Let the children feel wonderful.
Huijuan Yu ,
West Anhui University
Long Luo ,