Is there a neutral relationship between 'Yet the train trip across the country she will take at age 3 1/2 and her first day of kindergarten at age 5 may still be memorable when she is 80.' and 'She isn't going to remember the train trip across the country.', lacking direct logical ties?
Yet the train trip across the country she will take at age 3 1/2 and her first day of kindergarten at age 5 may still be memorable when she is 80.###She isn't going to remember the train trip across the country.