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According to our researches,we have found that children easily buckle the wrong button when they are dressin by themselves. it is aeasy thing for adults to do up their buttons correctly ,but it’s difficult to a litle child. however,this problem can be solved by designing a certain relationship between the buttonholes and buttons.the young children are in their initial stages of learning cognition and observation,so to change the color-ro-shape correspondence is the most useful way to arouse their resonances.