The design background is based on the natural state of children's drawing.We do a lot of unconscious behavior research on kids drawing.We find that there are two reasons for ignoring a problem, one is that the object is too small to be easily ignored by the naked eye; the other is that there is no good implementation condition, which leads to the neglect by the way.We need to change in form to amplify the problem and guide the behavior . A colorful triangle like a pocket, the purpose is to guide children to make desktop cleaning.The design has not changed so much.It is only a small change to make people pay attention to the problem. Kids are all kind, they just need a prompt to teach them doing better. When people finish drawing, they can put the rubber dander into the small triangle and take them away.