Safety regulators say parents who don't use booster seats for children are putting their kids at risk.
The National Highway Traffic Safety Administration says up to 90% of children in the US who should be restrained in a booster seat are not.
Generally, the transition to a booster seat comes after the child has outgrown a safety seat but is still too small for an adult seat belt.
Car accidents in the U-S injure more than 50,000 children a year. The safety agency's Jackie Glassman says booster seats could substantially cut that number.
Boosters should installed in the back seat and children should use them until they reach at least four-feet, nine inches in height.
To get the word out, this week has been dubbed "National Child Passenger Safety Week".
Colorado law requires booster seats for children up to age 6 and at least 55" tall.
To provide further incentives for parents to use a booster seat, AAA Colorado announced it is distributing 2,000 coupons from Babies 'R Us that offer a $10 discount on any booster seat over $40. The coupons are available at most AAA offices and are valid through April at any Babies 'R Us retail location.