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It is not easy for the adults to find children who are lost in the crowd because of thier short stature . However, with the help of the O!There,attaching a balloon with compressed gas to the backpack, parents can more easily find thier kids by using GPRS remote control on thier phones and releasing the balllon in bags, which will float in the air. At the same time, this can also remind people around the child that the kid is lost and they can provide help.
East China University of Science