Asuka Kamiya, a fourth-grader, was able to invent a garbage container that could automatically separate the metal waste once it was dumped, becoming the youngest Japanese to have an international patent on her behalf. After the great success of its invention, Kamia founded a company to help other children invent, and patent their inventions. The girl says that the school costs the students a summer vacation on a scientific project. The idea came when she saw her grandfather, tired of separating cans of mineral juice, "and I had the idea of ​​using a magnet that attracts only iron." Although the idea seemed simple, its practical application was not easy. It took about two weeks for the trial to go wrong. The iron cans stuck to the magnet and did not fall into the bottom of the container.