Child Safety

Please, I heard again today of another father who dropped off his 2 children and left his baby in his vehicle.  He simply forgot And the baby died, it's too hot outside.  How can we prevent one less infant or child from dying.  It has bothered me all day, in fact it always bothers me when I hear.  If we have a ding that we left the lights on, forgot our seat belt or even low on windshield fluid, then why couldn't we come up with a safety feature device that the baby seatbelt hooks into and then hooks into the baby seat every time a child's is in the vehicle, if the driver's side door is open it should buzz and ding until the seatbelt that is holding baby or child in is unhooked.  Let's save our children.  Thank you.