This video footage shows the horrifying consequences when children are not correctly restrained in cars.
The video, produced by the British Automobile Association, shows a number of crash tests using dummies.
Each crash impact occurs at just 19mph.

Researchers from the Sydney and NSW Universities recently set out to find out why [about 1000 Australian children are seriously injured in motor vehicle accidents each year, despite wearing seatbelts.] They trawled through past studies on seatbelts and child car crash injuries, and published their results in the Medical Journal of Australia.
They found that adult [...]

Click on this link for a short video with a detailed view of the olli with lots of information on its features.