What are the requirements for a booster seat?

Booster seat requirements typically include age, weight, and height guidelines. Children generally need to be at least 4 years old and weigh between 40 to 100 pounds, though this can vary by state. The booster seat should be used until the child is tall enough for the vehicle's seat belt to fit properly, usually when they reach about 4 feet 9 inches in height. Always refer to local laws and manufacturer instructions for specific requirements.