Transitions depend on your child’s growth and the car seat's limits. Typically: - From Rear-Facing to Forward-Facing: When the child exceeds the height or weight limit of the rear-facing seat, usually between 2-4 years. - From Forward-Facing to Booster: When the child exceeds the forward-facing seat's limits, usually between 4-7 years. - From Booster to Seat Belt: When the child is tall enough to sit against the vehicle seat back with knees bent at the edge of the seat and feet on the floor, usually between 8-12 years.