Things not to do on a cold day
To clarify: Cold in Hawaii is anything under 80 degrees.
I bought a Jeep, because Maui seems like the perfect place to own a convertible and there are not very many convertibles that fit four people...and I really thought yet another PT Cruiser would be a bad idea. Unfortunately, Maui is not the perfect place to own a convertible. It is too sunny nearly all the time. Fortunately, driving a Jeep with the doors and windows off (and a roof over your head) is a nearly perfect experience. I didn't really understand why someone might spend $20,000 making their Jeep into a better offroad vehicle. Maybe I still don't understand the $20,000, but after four miles (in each direction) on a light 4WD trail, I kind of get the appeal.
Had we moved here from California, I probably would not have been that interested in driving an hour up hill to see a Redwood Forest. But coming from New Zealand (where Redwoods were planted 100 years ago in hopes of logging them), it seemed like a fun road trip.
Anyway, if your children are cold at sea level, I would highly recommend making them wear long pants and coats if you're going to take them to 6000 feet.