I bet an attractive version could be designed, by tapping into the air at in the console, bumping up the speed with a 12V fan, and ducting it to the back through a smaller black hose, like 1".
BTW, OP, do your kids get hot with reflective film on that back window? That seems the simpler solution, provided the car starts pleasant.
BTW, OP, do your kids get hot with reflective film on that back window? That seems the simpler solution, provided the car starts pleasant.