Long term planning, father/daughter first car build

I know how you feel right now. I have twin 3 1/2 yr old girls. One is very into anything with wheels and the other just likes Jeeps (I also have a wrangler). The biggest question for me is what is my wife OK with them driving. Her requirement list looks something like the below:

Power Steering
Power Brakes
Disk All Around
Rev Limiter
Very good all weather tires
Shoulder harnesses
Working A/C & Heat
Highway gears or overdrive
Sway Bars
ZERO issues with overheating or leaking fluids

If I could start from scratch I my list would add the following:
318
Manual Transmission
Exhaust loud enough that I would hear it start/pull in at night
High Intensity Head Lights
I would seriously consider a roll cage

Right now I am waiting to see if they have any interest in driving my car when their are older. If they are really into it during the 10-13 stage I will either get mine ready for them (and find a new toy for me) or spend ~3 years getting theirs own all ready to go.

More likely is they will end up with previous generation soft top wrangler with a manual like I did when I was 16.