 And when your child is with you, put something of theirs on the front seat, like a stuffed animal or sippy cup. It provides your brain with a visual trigger that will tell you to check the back seat because your child is with you. And if you don't have children, Dr. Thomas says you can be a good neighbor. You can keep your vehicles at home always locked and the keys out of reach so that children in your neighborhood cannot access vehicles and get trapped inside.