@Jonado thank you for your reply. I am living in UK . To be honest I don't know what law says here. My daughter is 10 and she is big enough to sit in front. Though I never left her in the car.

Maybe some parents shouldn't be parents but they are and their children are not to blame . Probably the best thing would be a sensor in the car seat interfaced into the cars alarm system it happens way too often in the states .

@Besalbub Our kids are adults now but I remember working 60-80 hr weeks, my wife the same. The hub hub of parenting, trying to get enough sleep, getting sick and being forgetful. My phone is not more valuable than my kids but being a zombie, I sure was. My wife and I have spoken about what we would have done if this would've happen and my answer was to kill myself without hesitation. I could not live with myself if I caused something like this. So that said, if this trivial trick, for whatever reason, can prevent a kid from cooking or freezing to death in a car, I'm for it. I think it could save many lives at once be it deserving parents or not.

@Besalbub Chevrolet have this feature built in.