Booster seats are a genius invention because they lift kids up so that their seatbelts lie across the strong bones of the chest and pelvis instead of where it could do serious damage during an accident. Your child's body is not as durable and crash-resistant, so you'll need a booster seat or belt to protect them in case of emergencies. Your baby has an extremely soft cartilage structure that will turn into bone over time; this makes them much less resilient during auto accidents than someone with adult bones would be. The 59% reduction seen when children aged 4–7 use boosters’ seats against injuries alone proves its worth!