Babies, toddlers and children must have properly fitted and approved child restraints or child safety seats. Use a child restraint suitable for the child's age, size and weight on every trip. For more information have a look at the topic 'Car safety restraints'.
Always stop the car when you need to turn around to attend to your child in the back seat. It is so easy to get distracted and have an accident.
Make sure that there is nothing on the dashboard, the parcel shelf, or on the floor (even a box of tissues can do a lot of harm in an accident).