now she feels some pleasure , dim heat in her childish unmatured sex , and she closes her eyes as stan comes to her and she thinks of the birds , spring and the birds , and she sees them , again and again , all lighting at once , filling up the winter-naked trees , shockwave riders on the moving edge of nature 's most violent season , she sees them take wing again and again , the flutter of their wings like the snap of many sheets on the line , and she thinks : a month from now every kid in derry park will have a kite , they 'll run to keep the strings from getting tangled with each other .