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the jigsaw requires the children's eyes, brains and hands to work together at the same time. in the process, they should not be distracted. if they are distracted, they will make mistakes. they need to be completely overturned and reassembled. when playing puzzles, we should observe the layout at any time and place. children also need to constantly build "imaginary" patterns in their minds. when the number of puzzles is increasing, children need to remember more. cognitive ability of graphic color.syi