Child passenger safety specialists will check car seats on Friday, showing parents how to install them correctly. The event, sponsored by Safe Kids Gainesville-Hall County, is 2-4 p.m. at the Target at 514 Shallowford Road in Gainesville. State law requires children be restrained in the back seat in a car seat or booster seat appropriate for their height and weight until they are 8 years old or 4 feet 9 inches tall.