In the beginning of the story "Marigolds", Lizabeth is childlike. For example her and all the other younger kids threw rocks at miss Lottie's marigolds, which she loved very much. She then proceeded to lead and attack to miss Lottie and led the chant of "Old witch, fell in a ditch, picked up a penny and thought she was rich!
In the middle of the story, Lizabeth is transitioning from a girl to a young woman. This shows when she did one last crazy act of childhood and ripped, trampled, and destroyed miss Lottie's marigolds. In the story it also states "and that was the moment when childhood faded and adulthood began.
At the end of the story, Lizabeth is now acting like a real adult. For example she realizes what miss Lottie has been through and understands why she plants marigolds and loves them so much. As Lizabeth says at the end of the story, "I too have planted marigolds" which overall shows her new feelings and opinions that she has changed in adulthood.