The Laerdal Little Junior rib plate serves as a vital internal structural replacement component for child-sized CPR training manikins. Positioned within the chest cavity, this resilient plate provides the authentic mechanical resistance and anatomical deflection required for high-quality chest compression practice. Swapping out a cracked or fatigued internal rib assembly ensures that basic life support (BLS) training programs can continue delivering accurate physical feedback, correct compression depth metrics, and realistic tactile simulation during student performance evaluations.