As for kids and driving... my oldest daughter Jena is 15 -- and frankly, the thought of her driving the SL would lead me to post in the other thread about "Pagoda fear factors"!! I recently took her out in my truck to a nice wide, (abandoned!), street for her first lesson... (darn those were my best jeans)... actually I guess she did ok -- but the thought of real driving is going to take me a while to get used to.
In the case of 49er, the "kids," in their 30's know how to drive. They just need to learn how to shift, not so hard to become functional, but lots of experience to become very smooth upshifting and downshifting, especially at high rpms.
I enjoyed teaching my kids to drive. With my son, we went to a college parking lot on Sundays and with my daughter, we went to a cemetery on weekends and evenings. Since the car she wanted, a Volkswagen Beetle was a stick, she learned to drive that at the same time. She shifts as smoothly as her Daddy, it's what we would work on. Took a bit to get her to understand the mechanics of what she was doing with the engine, transmission and clutch so that she could intellectually conceptualize the process. My son got it right away. They both still have their first cars, she the 2000 Beetle, he a '91 BMW 318is (but, he drives a beater Suby at college).
That said, my daughter did have a little incident in the driveway when she was learning to drive!
LOL!