Can someone help me paraphrase this "Age 30 is not a magical turning point, however. Openness declines gradually over many years, often beginning in the 20's. As the years wear on , novelty becomes less and less stimulating, and the world outside someone's own private and professional sanctums becomes increasingly less attractive. This change happens to almost everyone, regardless of individual personality. That does not mean that everyone reaches the same level of openness in later life, however. Some toddlers love to go back to the same playground day after day, whereas others get bored after a day or two of digging in the same sandbox with the same shovel. Children who are less open to new experiences than their peers are will continue in adulthood to cleave to the conventional more than their more adventurous childhood friends will. As psychologist Richard W. Robins of the University of California, Davis, showed in a longitudinal study, those who begin life with a more open personality remain relatively more open in their later years."

This excerpt tells us about a person`s openness and how that process functions. People, as getting older and passing 20`s, become more and more turned to their private circle of people and events and that happens to everyone. Though we can not say that everyone reached the same level of openness. Some people are introverted through their whole life (from first social contacts and events till the end of their life). Psychologist R. Robins showed with his study that people who have been opened from the earliest age relatively stay that way when they get older.