What are the recommended four stages of child passenger safety?

The four recommended stages for child safety restraints are:

• Ages 0-2: Place children in a rear-facing safety seat in the back of the vehicle.
• Ages 2-4: Place children in a front-facing safety seat that includes a harness.
• Ages 4-8: Place children in a booster seat.
• Age 8 and older: Children can use standard seat belts, assuming the belt fits properly.