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Most of toys are made by plastic material and have thick oil paint,and the latest research shows that it's very harmful for health.
Withe the age growth of children,lots of toys are threw away and causes a lot of carbon emission.
6-10 years old: Simple math game such as add, subtract, multiply and divide,or play number game with colorful dice,
Finally it's still stationary pen insert
Innovative use way,joint of game function, use of bamboo,and long life cycle mean environmental and friendly,don't have any carbon emission,so that give the product profound meaning
Chen Yongjun Chen Hongyu Wang Wei Zhang Shiming