Back Seat Heat

Since it seems all cars are made alike, I beleive it would be smart to change a few models and add a need to Northern Climates, that get -0 degrees in Winter Climates. I would like to see CARS having Back Seat Heat. I have tested many vehicles and I am unaware of any exsisting in CARS. We need to put blowers in the back seats for our Children to stay warm, plus options can be AC too for Summer and Florida like weather. Thank You for your time. I have many other Ideas and would like to spread the word. God Bless