Car safety seats for children; child booster cushions for vehicle seats; child carrying seats for use in vehicles; child restraint devices for use with vehicle seats; child safety seats for use in vehicles; children's seats for use in cars; children's seats for use in vehicles; convertible car seats; head-rests for car seats; restraints for use with vehicle seat belts; safety seats adapted for use by children in vehicles; safety seats for babies for use in vehicles; safety seats for children (for vehicles); safety seats for vehicles; trays for car safety seats; vehicle booster seats for children; vehicle booster seats for use with a safety harness; vehicle safety harness for safety seats for children; vehicle safety restraints for use with safety seats; vehicle safety seats for children