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To make an adjustment for these snap buttons on clothes. Then the children won’t button wrong when they fasten the button, if the first snap button is male buttons on the left of the clothes，and female button on the right，then the next pair shall be female on the left, male on the right, and so on.
Chongqing University
ChongQing province, China
Zimeng Wang,
Chongqing University
Chenmin Pan,
Chongqing University
Maodan Tian,
Chongqing University
Ying Huang,
Chongqing University
