what age should booster seats be used
1 Some booster seats can be used for children up to 60 inches and 120 pounds. 2  Many state laws prefer that children 12 years and younger sit in the back seat if available. 3  Some states, as is the case in Michigan, forbid placing a child under the age of 4 years in a front seat if a rear seat is available. All children who are smaller than 150 cm (4 ft 11 in) and younger than 14 years old must use a booster or car seat appropriate to their weight. 2  A child must be either 14 years old or 4'11 to ride without a booster seat.