These toys could harm your child if you were involved in a crash. Extra padding puts too much space between the baby and the car seat, and has not been crash tested. Children Over Age 1 and Between 20 and 40 pounds These children should be facing forward in the back seat of the vehicle. Flip that out to help stabilize the seat. Harness straps should go through the slots at or above shoulder level.
Most car seats have a reinforced plastic hump or bar in the back.
If yours does, then the harness straps must go over that bar and through the top slots. Make sure that the retainer clip rests at armpit level. Children over the age of four and 40 pounds Children at this point should be placed in booster seats until they reach eight years and 80 pounds. Do not place them in a seatbelt alone. Seatbelts are made to fit adults, not small children.