I was floored when I came across this list.
https://www.valuepenguin.com/cheapest-cars-insure-teens
Of course, I own a Miata (never had considered it a car for my boys to eventually drive often and I still think it's a bad idea), and as I mentioned on an earlier waffling thread, would definitely consider a GTI (or other Golf) for them to use.
I am just surprised the Miata and GTI are up near the top. They seem like cars that would get kids to drive fast/irresponsibly and thus be expensive to insure.
And yes, I have 5 years until I have to worry about it.