If you're driving your rented car from the cheap car rentals in Lafayette with kids, you should remember to adhere to the Louisiana Child Car Seat Laws. In particular, your car seat should have an internal harness. 4-to 6-year-old kids weighing 60 pounds need a belt-positioning booster seat, while your kids above 6 and more than 60 pounds should have a lap-shoulder belt seat. Search rental cars on KAYAK