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Balance Cobblestone / Cobblestone

Balance Cobblestone

It maybe make kids feel sad to let the balloon fly away due to carelessly when they play it.The fly balloon like to a timing bomb ,maybe twine the electric wire or cause the air pollution.The dross of explosion balloon are likely to eat by animal.The balance cobblestone can not only let the balloon keep balanced in situ when you leave it but find it back to prevent the accident.

University

ZengCheng college of South China Normal University,LuoGang District,GuangZhou City,GuangDong Provinc

ZengCheng college of South China Normal University,LuoGang District,GuangZhou City,GuangDong Provinc
GuangZhou City,Guang, China

Han Mai,
ZengCheng college of South China Normal University,LuoGang District,GuangZhou City,GuangDong Provinc

JianWu Lv