According to Hong Kong experts, long sleepimproves children's health. Research data shows that children who get enough sleep on weekends are less likely to develop obesity. Most school-age children sleep longer on weekends than on other days of the week. And overweight children wake up on weekends at almost the same time as on weekdays. In addition, overweight children are less active and learn lessons worse than their peers with normal weight. In general, experts say that in the middle of the week, a child's sleep should last no less than eight hours a day. And on Saturdays and Sundays, our children can sleep up to ten hours.