A CHILDS CONSTITUTION
The youngest children are still growing and so have ligaments and muscles in the neck which are much more flexible but also weaker. This protects them from slight movements and when leaning but is also an additional risk in a major impact. It also increases their risk of injury to the head, vertebrae and the spine, which can cause paralysis. Taking into account that the liver and the spleen are proportionally much bigger and so are less protected by the ribs it increases the risk if internal hemorrhage and visceral damage.
THE WEIGHT OF OBJECTS
Another factor in an accident is the force of the impact caused by objects or people displaced during an accident, which can be 10 or 20 times more than normal. This makes holding a child in your arms very dangerous at it makes it impossible to restrain them in an accident.
Apart from restraining a child using a CRS you need to watch out for objects lying around in the car. Any heavy or pointed object can become a lethal weapon in an accident involving a child. To prevent this the MAPFRE FOUNDATION recommend you only carry light or soft toys in the car and ensure that any luggage in the trunk cannot burst through into the car and hit a child.