I'm hoping I'm allowed to share this link as it directly revolved around child safety. This little girl let herself into the family car... Only to be found 30 minutes too late.
Avas rules are to keep your keys away from children's access, always lock the car and make sure YOUR child knows never to enter a car alone and to beep the horn if they can't get out.
I know personally I had always assumed my son wouldn't do something like let himself into a car without me, but as Avas parents point out... There's no arguing with 3 year olds logic. When my son gets home from kindy, im giving him a car safety lesson!