Jackson Taylor, 16-months-old, was in the car with his mum and sister when they collided head on with another vehicle at around 70mph.
The force of the crash was so bad that Jackson's head pulled apart from his neck, in what's known as an internal decapitation.
Spinal surgeon Dr Geoff Askin said: "A lot of children wouldn't survive that injury in the first place, and if they did and they were resuscitated then they may never move or breathe again."
But after a gruelling six hour surgery, Dr Askin and his team of expert surgeons managed to reattach his vertebrae, using a tiny piece of wire and a piece of Jackson's rib to graft them back together.