Half of all kids ages four to seven are not safe when riding in the car, the government reports.
That's because they're either not restrained at all, or they are not using the recommended booster seat.
If your child is age between four and eight years old, the government says they should ride in a booster seat.
"If you've taken good care of your infant and you've taken good care of your child up to the age of four, why would you become negligent from four to eight?" Bob Darbelnet of AAA asked.
But this is how many children ride in seat belts too big or too loose.
The National Highway Traffic Safety Administration recommends booster seats because they reduce the risk of injury by almost 60 percent.
Just ask Madison Harty, an accident victim who was riding in a booster when she was five.
"I would tell them that you should really use a booster because it can save your life," Harty said.
But right now, only 13 states and the District of Columbia require booster seats - without exception - for kids up to eight years old.
That puts the decision squarely in the hands of parents. Many see the seats as a hassle, or at least their kids do.
"This a moment where parents really need to be parents and say, 'No. You're riding in that booster seat because it's safer. End of discussion,' Nicole Nason of the NHTSA said.
The government recommends car seats for children up to 40 pounds. Kids more than 40 pounds should use a booster seat until they're eight years old, or at least four feet nine inches tall.
And all kids should ride in the back seat until they're 13.
If you're not sure what's the best seat to buy check out this: the NHTSA has a new five-star rating system, which should make it even easier for parents to keep their kids safe.