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Yoyo is a toy, but also a lamp. In many parts of Africa, in addition to dim moonlight, there is only iskerosene lamp light up the night .Yoyo brings new solutions, so that children in Africa can achieve two wishes,have a toy, reading in the light every night .Play Yo Yo, the built-in pendulum will continue to swing, and is linked to a small generator power generation mechanism rotates.The power will be stored in the built-in rechargeable battery to provide power for the LED lamp inside the yoyo.