In last week’s Keeping Kids Healthy column by UTMB Drs. Sally Robinson and Keith Bly: Many parents don’t realize that their child may not be getting enough sleep every night. Most people feel that eight hours a night is plenty of sleep for a school-age child. However, children between 5 and 12 years old need about 9 to 12 hours of sleep every night. Sleep is important for children because it has an effect on their mental and physical well-being, and the hormone that stimulates growth is released while a child sleeps.